RE: [PHP] Sorting Help
-Original Message-
From: Floyd Resler [mailto:fres...@adex-intl.com]
Sent: Wednesday, April 11, 2012 11:26 AM
To: PHP
Subject: [PHP] Sorting Help
I need to sort the following array:
{
[Smith, Bob]=array(137.5,125.5),
[Jones, Robert]=array(132.7,128.2)
}
The array needs to be sorted by the first number (i.e. 137.5) and then the
second in descending order. I looked at array_multisort but couldn't figure
out how to make work for my needs.
Thanks!
Floyd
Do me a favor and copy a print_r of your array because this I can't figure
out what you're are doing with that.
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RE: [PHP] Sorting Help
-Original Message-
From: Floyd Resler [mailto:fres...@adex-intl.com]
Sent: Wednesday, April 11, 2012 11:26 AM
To: PHP
Subject: [PHP] Sorting Help
I need to sort the following array:
{
[Smith, Bob]=array(137.5,125.5),
[Jones, Robert]=array(132.7,128.2)
}
The array needs to be sorted by the first number (i.e. 137.5) and then the
second in descending order. I looked at array_multisort but couldn't figure
out how to make work for my needs.
Thanks!
Floyd
Here is what I did to your array
$test = array(Smith, Bob=array(137.5,125.5),Jones
Robert=array(132.7,128.2));
asort($test);
print_r('pre');
print_r($test);
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Re: [PHP] Sorting Help
On Apr 11, 2012, at 1:11 PM, admin wrote:
-Original Message-
From: Floyd Resler [mailto:fres...@adex-intl.com]
Sent: Wednesday, April 11, 2012 11:26 AM
To: PHP
Subject: [PHP] Sorting Help
I need to sort the following array:
{
[Smith, Bob]=array(137.5,125.5),
[Jones, Robert]=array(132.7,128.2)
}
The array needs to be sorted by the first number (i.e. 137.5) and then the
second in descending order. I looked at array_multisort but couldn't figure
out how to make work for my needs.
Thanks!
Floyd
Here is what I did to your array
$test = array(Smith, Bob=array(137.5,125.5),Jones
Robert=array(132.7,128.2));
asort($test);
print_r('pre');
print_r($test);
That almost worked. I did an arsort() and got the following:
Array
(
[Guy, Matt] = Array
(
[0] = 164.67
[1] = 135.67
)
[Smith, Toby] = Array
(
[0] = 159.33
[1] = 132.33
)
[Young, Matt] = Array
(
[0] = 157.67
[1] = 131.67
)
[Shobe, Dale ] = Array
(
[0] = 157.67
[1] = 128.67
)
[King, Derrick] = Array
(
[0] = 155.67
[1] = 126.67
)
[Reynolds, Jeff] = Array
(
[0] = 155.67
[1] = 133.67
)
[Bobo, Tom] = Array
(
[0] = 152.33
[1] = 124.33
)
[Henderson, Cody] = Array
(
[0] = 150.33
[1] = 121.33
)
[McGuffin, Jimmy] = Array
(
[0] = 145.67
[1] = 118.67
)
[Stone, Richard] = Array
(
[0] = 145
[1] = 119.00
)
[Biggerstaff, David ] = Array
(
[0] = 142.33
[1] = 115.33
)
[Dennis, Daymon] = Array
(
[0] = 142
[1] = 114.00
)
[Bush, Duke] = Array
(
[0] = 141
[1] = 121.00
)
}
That's not the entire array but it sorts just fine except for two entries. For
some reason these two aren't sorting in descending order of the second element:
[King, Derrick] = Array
(
[0] = 155.67
[1] = 126.67
)
[Reynolds, Jeff] = Array
(
[0] = 155.67
[1] = 133.67
)
Everything else sorts just fine. I'm not sure why that is.
Thanks!
Floyd
Re: [PHP] Sorting Help
On 11 Apr 2012, at 16:26, Floyd Resler wrote:
I need to sort the following array:
{
[Smith, Bob]=array(137.5,125.5),
[Jones, Robert]=array(132.7,128.2)
}
The array needs to be sorted by the first number (i.e. 137.5) and then the
second in descending order. I looked at array_multisort but couldn't figure
out how to make work for my needs.
Use a custom sorting function, then you can sort any way you want:
http://php.net/usort
-Stuart
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Re: [PHP] Sorting Help
Bastien Koert
On 2012-04-11, at 2:18 PM, Floyd Resler fres...@adex-intl.com wrote:
On Apr 11, 2012, at 1:11 PM, admin wrote:
-Original Message-
From: Floyd Resler [mailto:fres...@adex-intl.com]
Sent: Wednesday, April 11, 2012 11:26 AM
To: PHP
Subject: [PHP] Sorting Help
I need to sort the following array:
{
[Smith, Bob]=array(137.5,125.5),
[Jones, Robert]=array(132.7,128.2)
}
The array needs to be sorted by the first number (i.e. 137.5) and then the
second in descending order. I looked at array_multisort but couldn't figure
out how to make work for my needs.
Thanks!
Floyd
Here is what I did to your array
$test = array(Smith, Bob=array(137.5,125.5),Jones
Robert=array(132.7,128.2));
asort($test);
print_r('pre');
print_r($test);
That almost worked. I did an arsort() and got the following:
Array
(
[Guy, Matt] = Array
(
[0] = 164.67
[1] = 135.67
)
[Smith, Toby] = Array
(
[0] = 159.33
[1] = 132.33
)
[Young, Matt] = Array
(
[0] = 157.67
[1] = 131.67
)
[Shobe, Dale ] = Array
(
[0] = 157.67
[1] = 128.67
)
[King, Derrick] = Array
(
[0] = 155.67
[1] = 126.67
)
[Reynolds, Jeff] = Array
(
[0] = 155.67
[1] = 133.67
)
[Bobo, Tom] = Array
(
[0] = 152.33
[1] = 124.33
)
[Henderson, Cody] = Array
(
[0] = 150.33
[1] = 121.33
)
[McGuffin, Jimmy] = Array
(
[0] = 145.67
[1] = 118.67
)
[Stone, Richard] = Array
(
[0] = 145
[1] = 119.00
)
[Biggerstaff, David ] = Array
(
[0] = 142.33
[1] = 115.33
)
[Dennis, Daymon] = Array
(
[0] = 142
[1] = 114.00
)
[Bush, Duke] = Array
(
[0] = 141
[1] = 121.00
)
}
That's not the entire array but it sorts just fine except for two entries.
For some reason these two aren't sorting in descending order of the second
element:
[King, Derrick] = Array
(
[0] = 155.67
[1] = 126.67
)
[Reynolds, Jeff] = Array
(
[0] = 155.67
[1] = 133.67
)
Everything else sorts just fine. I'm not sure why that is.
Thanks!
Floyd
Check that you don't have a space in front of those values. That could cause
some confusion.
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Re: [PHP] Sorting an array
On 2/28/2011 7:52 PM, Ron Piggott wrote: I need help to know how to sort the words / phrases in my array. Variable name: $words_used print_r( $words_used ); Current output: Array ( [187] = Sin [249] = Punished [98] = Sanctuary [596] = Sing [362] = Anointing Oil ) Desired result: Alphabetical sort: Array ( [362] = Anointing Oil [249] = Punished [98] = Sanctuary [187] = Sin [596] = Sing ) The #’s are the auto_increment value of the word in the mySQL database. The number is not representative of alphabetical order, but the order it was added to the database. Thank you for your assistance. Ron The Verse of the Day “Encouragement from God’s Word” http://www.TheVerseOfTheDay.info Besides the answer others have pointed you to, I would recommend doing it in mysql? SELECT * FROM table ORDER BY your_column; Check out the syntax for it here. http://dev.mysql.com/doc/refman/5.0/en/select.html and http://dev.mysql.com/doc/refman/5.0/en/order-by-optimization.html Jim Lucas -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting an array
On 1/03/2011, at 4:52 PM, Ron Piggott wrote: I need help to know how to sort the words / phrases in my array. Variable name: $words_used print_r( $words_used ); Current output: Array ( [187] = Sin [249] = Punished [98] = Sanctuary [596] = Sing [362] = Anointing Oil ) Desired result: Alphabetical sort: Array ( [362] = Anointing Oil [249] = Punished [98] = Sanctuary [187] = Sin [596] = Sing ) The #’s are the auto_increment value of the word in the mySQL database. The number is not representative of alphabetical order, but the order it was added to the database. Thank you for your assistance. Ron The Verse of the Day “Encouragement from God’s Word” http://www.TheVerseOfTheDay.info Have a look at asort() (http://php.net/asort), which is used to sort arrays but maintain the key association. The default search option should work fine for you, if not try one of the other SORT_* flags described on the sort() manual page. --- Simon Welsh Admin of http://simon.geek.nz/ Who said Microsoft never created a bug-free program? The blue screen never, ever crashes! http://www.thinkgeek.com/brain/gimme.cgi?wid=81d520e5e -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting an array of sub-arrays based on a sub-array's key
On Sun, Sep 6, 2009 at 6:45 PM, James Colanninoja...@colannino.org wrote:
Hey everyone. I have an array that looks like this:
$main_array[0] = array('key1' = 'vala');
$main_array[1] = array('key1' = 'valb');
etc.
I want to sort the main array based on the value of key1 for each
sub-array. I looked at all the array sorting functions, but unless I
misunderstood something, I didn't see a direct way to do what I want.
If there were a sorting function in which I could pass as an argument
the name of a function that compares two elements like qsort in C, I
could do it easily. Is there a function like that in PHP? If not, what
should I do?
Thanks everyone!
James
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http://us3.php.net/uasort
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Re: [PHP] Sorting an array of sub-arrays based on a sub-array's key
Eddie Drapkin wrote: http://us3.php.net/uasort Exactly what I was looking for. Thanks. James -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting mySQL query - one order from multiple fields
In case anyone else was wondering, the command to use is COALESCE() as in: $theQuery = mysql_query(select variousFields from theTable where date = '$currDate' ORDER BY COALESCE(rotime2,rotime1,time)); COALESCE() will use one of the variables, being the one it finds a value for first, for each record. Note how this differs from a multi sort, which sorts by the first field, then subsorts by the second, third, etc. Hope this helps someone. George Langley Multimedia Developer, Audio/Video Editor, Musician, Arranger, Composer http://www.georgelangley.ca - On 14-Jun-09, at 8:30 PM, George Langley wrote: Hi all. Am trying to sort baseball games by time, where there can be up to 3 times listed per game. Each game has an original date and time field, plus fields for 2 rain-out dates/times (rodate1 rotime1, rodate2, rotime2), to use if the game gets rained out. Note that rotime1 and rotime2 are NULL if no time has been entered. Also note that the original date and time fields are not changed - they are kept for posterity. Usually, the rain-out date is set to a day that the teams were already going to play each other again, with the rain-out game going first. So need to sort those 2 games in order: rain-out first, then normally-scheduled. But, I can't just sort on the time field, as the rain-out game could now have a different time. I need to use the rotime2 (if it exists), else use the rotime1 (if it exists), else use the time. Can not get my query order to work. One of the variations I've tried: $theQuery = mysql_query(select variousFields from theTable where date = '$currDate' ORDER BY CASE WHEN rotime2 THEN rotime2 WHEN rotime1 THEN rotime1 ELSE time); Is there a query sort that will work in this case? Is not the usual sort by last name, then sort by first name scenario! Thanks for any pointers. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting times (SOLVED)
Just a draft i thought should not go unnoticed on the list :-) just cleaning
up.
OK,
How about a super efficient soln where each string is only converted once
and a fast sorting algorithm is used:
?php
function time_sort($a, $b) {
static $now = time();
if (strtotime($a, $now) == strtotime($b, $now)) {
return 0;
}
return (strtotime($a, $now) strtotime($b, $now) ? -1 : 1;
}
function sortTime($times) {
}
Tim-Hinnerk Heuer
http://www.ihostnz.com
Fred Allen - California is a fine place to live - if you happen to be an
orange.
2009/2/16 Shawn McKenzie nos...@mckenzies.net
tedd wrote:
At 9:31 PM -0600 2/14/09, Shawn McKenzie wrote:
Yeah, hif I had known that you wanted a function where you loop through
your array twice, that would have done it. Bravo.
Shawn:
I don't see another way. You go through the array converting string to
time (seconds), sort, and then convert back. You have to go through the
array more than once.
Cheers,
tedd
The other way, is the most likely ultra-fast solution I posted.
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http://www.spidean.com
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Re: [PHP] Sorting times (SOLVED)
At 9:31 PM -0600 2/14/09, Shawn McKenzie wrote: Yeah, hif I had known that you wanted a function where you loop through your array twice, that would have done it. Bravo. Shawn: I don't see another way. You go through the array converting string to time (seconds), sort, and then convert back. You have to go through the array more than once. Cheers, tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting times (SOLVED)
tedd wrote: At 9:31 PM -0600 2/14/09, Shawn McKenzie wrote: Yeah, hif I had known that you wanted a function where you loop through your array twice, that would have done it. Bravo. Shawn: I don't see another way. You go through the array converting string to time (seconds), sort, and then convert back. You have to go through the array more than once. Cheers, tedd The other way, is the most likely ultra-fast solution I posted. -- Thanks! -Shawn http://www.spidean.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting times
1. convert the string representation of times to timestamps using
strtotime()
2. sort the timestamps
3. display the timestamps as strings using date('format', timestamp)
Would that work?
John Corry
email: jco...@gmail.com
On Feb 14, 2009, at 4:07 PM, tedd wrote:
Hi gang:
Anyone have/know a routine that will sort an array of times?
For example, a function that would take an array like this:
time[0] ~ '1:30pm'
time[1] ~ '7:30am'
time[2] ~ '12:30pm'
and order it to:
time[0] ~ '7:30am'
time[1] ~ '12:30pm'
time[2] ~ '1:30pm'
Cheers,
tedd
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Re: [PHP] Sorting times
John Corry wrote:
1. convert the string representation of times to timestamps using
strtotime()
2. sort the timestamps
3. display the timestamps as strings using date('format', timestamp)
Would that work?
John Corry
email: jco...@gmail.com
On Feb 14, 2009, at 4:07 PM, tedd wrote:
Hi gang:
Anyone have/know a routine that will sort an array of times?
For example, a function that would take an array like this:
time[0] ~ '1:30pm'
time[1] ~ '7:30am'
time[2] ~ '12:30pm'
and order it to:
time[0] ~ '7:30am'
time[1] ~ '12:30pm'
time[2] ~ '1:30pm'
Cheers,
tedd
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Yes, I would probably store and manipulate times as a timestamp and then
format them for printing, but then there would always be a date
associated with the timestamp as well (whether you need it or not). So
you could store them in 24hr time format and sort those and then format
to display in the 12 hour format.
--
Thanks!
-Shawn
http://www.spidean.com
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Re: [PHP] Sorting times (SOLVED)
At 4:15 PM -0500 2/14/09, John Corry wrote:
1. convert the string representation of times to timestamps using strtotime()
2. sort the timestamps
3. display the timestamps as strings using date('format', timestamp)
Would that work?
John Corry
email: jco...@gmail.com
John:
Bingo -- that worked!
Thanks.
tedd
---
Here's the code.
?php
// == returns a time array sorted
function sortTime($in_times)
{
$time = array();
foreach ($in_times as $t)
{
$time [] = strtotime($t);
}
sort($time);
$sort_time = array();
foreach ($time as $t)
{
$sort_time[] = date('g:ia', $t);
}
return $sort_time;
}
?
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Re: [PHP] Sorting times (SOLVED)
tedd wrote:
At 4:15 PM -0500 2/14/09, John Corry wrote:
1. convert the string representation of times to timestamps using
strtotime()
2. sort the timestamps
3. display the timestamps as strings using date('format', timestamp)
Would that work?
John Corry
email: jco...@gmail.com
John:
Bingo -- that worked!
Thanks.
tedd
---
Here's the code.
?php
// == returns a time array sorted
function sortTime($in_times)
{
$time = array();
foreach ($in_times as $t)
{
$time [] = strtotime($t);
}
sort($time);
$sort_time = array();
foreach ($time as $t)
{
$sort_time[] = date('g:ia', $t);
}
return $sort_time;
}
?
Yeah, hif I had known that you wanted a function where you loop through
your array twice, that would have done it. Bravo.
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Thanks!
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http://www.spidean.com
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Re: [PHP] Sorting Arrays
I believe you'll need a custom sorting function for this.
http://us.php.net/usort
Thank you,
Micah Gersten
onShore Networks
Internal Developer
http://www.onshore.com
Tom Shaw wrote:
I'm having a problem sorting my array and wondered if anybody had experience
sorting arrays by their values. What I need to do is resort the array below
where the most expensive product shipping price starts at position zero no
matter how big the array is.
array(2) {
[0] = array(48) {
[product_id] = string(2) 34
[product_name] = string(29) Bears Ball Cap
[product_ordered_size] = string(5) ADULT
[product_sales_price] = string(8) 11.90
[product_shipping_price] = string(4) 7.85
[product_shipping_extra] = string(4) 0.06
}
[1] = array(48) {
[product_id] = string(2) 37
[product_name] = string(21) Baldwin L Grand Piano
[product_ordered_size] = string(5) Grand
[product_sales_price] = string(8) 11671.90
[product_shipping_price] = string(6) 500.00
[product_shipping_extra] = string(6) 450.00
}
Thanks
[EMAIL PROTECTED]
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Re: [PHP] Sorting Arrays
Yeah, a bubble sorting algorithm should fix it, as it essentially only a
very simple sort required.
Ash
www.ashleysheridan.co.uk
---BeginMessage---
I believe you'll need a custom sorting function for this.
http://us.php.net/usort
Thank you,
Micah Gersten
onShore Networks
Internal Developer
http://www.onshore.com
Tom Shaw wrote:
I'm having a problem sorting my array and wondered if anybody had experience
sorting arrays by their values. What I need to do is resort the array below
where the most expensive product shipping price starts at position zero no
matter how big the array is.
array(2) {
[0] = array(48) {
[product_id] = string(2) 34
[product_name] = string(29) Bears Ball Cap
[product_ordered_size] = string(5) ADULT
[product_sales_price] = string(8) 11.90
[product_shipping_price] = string(4) 7.85
[product_shipping_extra] = string(4) 0.06
}
[1] = array(48) {
[product_id] = string(2) 37
[product_name] = string(21) Baldwin L Grand Piano
[product_ordered_size] = string(5) Grand
[product_sales_price] = string(8) 11671.90
[product_shipping_price] = string(6) 500.00
[product_shipping_extra] = string(6) 450.00
}
Thanks
[EMAIL PROTECTED]
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Re: [PHP] Sorting Arrays
On Fri, 2008-08-22 at 21:04 +0100, Ashley Sheridan wrote:
Yeah, a bubble sorting algorithm should fix it, as it essentially only
a very simple sort required.
Why use bubble sort when you can use usort() function with an arbitrary
handler?
Cheers,
Rob.
Ash
www.ashleysheridan.co.uk
email message attachment, Forwarded message - Re: [PHP] Sorting
Arrays
Forwarded Message
From: Micah Gersten [EMAIL PROTECTED]
To: Tom Shaw [EMAIL PROTECTED]
Cc: php-general@lists.php.net
Subject: Re: [PHP] Sorting Arrays
Date: Fri, 22 Aug 2008 14:18:53 -0500
I believe you'll need a custom sorting function for this.
http://us.php.net/usort
Thank you,
Micah Gersten
onShore Networks
Internal Developer
http://www.onshore.com
Tom Shaw wrote:
I'm having a problem sorting my array and wondered if anybody had
experience
sorting arrays by their values. What I need to do is resort the array
below
where the most expensive product shipping price starts at position zero no
matter how big the array is.
array(2) {
[0] = array(48) {
[product_id] = string(2) 34
[product_name] = string(29) Bears Ball Cap
[product_ordered_size] = string(5) ADULT
[product_sales_price] = string(8) 11.90
[product_shipping_price] = string(4) 7.85
[product_shipping_extra] = string(4) 0.06
}
[1] = array(48) {
[product_id] = string(2) 37
[product_name] = string(21) Baldwin L Grand Piano
[product_ordered_size] = string(5) Grand
[product_sales_price] = string(8) 11671.90
[product_shipping_price] = string(6) 500.00
[product_shipping_extra] = string(6) 450.00
}
Thanks
[EMAIL PROTECTED]
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Re: [PHP] Sorting Arrays
Robert Cummings wrote: On Fri, 2008-08-22 at 21:04 +0100, Ashley Sheridan wrote: Yeah, a bubble sorting algorithm should fix it, as it essentially only a very simple sort required. Why use bubble sort when you can use usort() function with an arbitrary handler? Cheers, Rob. Exactly. That's one reason why I love PHP. They have functions that do things you have to write subroutines for in other languages. Thank you, Micah Gersten onShore Networks Internal Developer http://www.onshore.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting Arrays
Tom Shaw wrote:
I'm having a problem sorting my array and wondered if anybody had experience
sorting arrays by their values. What I need to do is resort the array below
where the most expensive product shipping price starts at position zero no
matter how big the array is.
array(2) {
[0] = array(48) {
[product_id] = string(2) 34
[product_name] = string(29) Bears Ball Cap
[product_ordered_size] = string(5) ADULT
[product_sales_price] = string(8) 11.90
[product_shipping_price] = string(4) 7.85
[product_shipping_extra] = string(4) 0.06
}
[1] = array(48) {
[product_id] = string(2) 37
[product_name] = string(21) Baldwin L Grand Piano
[product_ordered_size] = string(5) Grand
[product_sales_price] = string(8) 11671.90
[product_shipping_price] = string(6) 500.00
[product_shipping_extra] = string(6) 450.00
}
Thanks
[EMAIL PROTECTED]
Everything can be done with three custom lines of code, the rest is PHP
existing function calls.
http://us3.php.net/manual/en/function.array-multisort.php
Example #3 Sorting database results
I expanded your list below and randomly added some data... Anyways,
replace my $ar array definition with your array and you should be good
to go. One question though, is this coming from a DB? If so, why not
do the sorting in the SQL call instead of PHP? Just a thought.
plaintext?php
$ar = array(
array(
product_id = 34,
product_name = Bears Ball Cap #34,
product_ordered_size = ADULT,
product_sales_price = 11.90,
product_shipping_price = 7.85,
product_shipping_extra = 0.06,
),
array(
product_id = 35,
product_name = Baldwin L Grand Piano #35,
product_ordered_size = Grand,
product_sales_price = 11671.90,
product_shipping_price = 51.00,
product_shipping_extra = 450.00,
),
array(
product_id = 36,
product_name = Baldwin L Grand Piano #36,
product_ordered_size = Grand,
product_sales_price = 11671.90,
product_shipping_price = 500.00,
product_shipping_extra = 450.00,
),
array(
product_id = 37,
product_name = Baldwin L Grand Piano #37,
product_ordered_size = Grand,
product_sales_price = 11671.90,
product_shipping_price = 5000.00,
product_shipping_extra = 450.00,
),
array(
product_id = 38,
product_name = Baldwin L Grand Piano #38,
product_ordered_size = Grand,
product_sales_price = 11671.90,
product_shipping_price = 50.00,
product_shipping_extra = 450.00,
),
array(
product_id = 39,
product_name = Baldwin L Grand Piano #39,
product_ordered_size = Grand,
product_sales_price = 11671.90,
product_shipping_price = 1.00,
product_shipping_extra = 450.00,
)
);
foreach ( $ar AS $k = $v ) {
$p_shipping_price[$k] = $v['product_shipping_price'];
}
array_multisort($p_shipping_price, SORT_DESC, $ar);
var_dump($ar);
?
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Re: [PHP] Sorting files in a directory
Steve Marquez wrote:
I know this code does not work, but I was curious if someone can take a look
and tell me what is wrong? Thank you so much.
Re-indent your code properly. If you do it will look like:
?php
$pattern = .html*|.php*;
if (is_dir(files/)) {
if ($dh = opendir(files/)) {
echo select name=\file\ size=\8\;
while (($file = readdir($dh)) !== false) {
if (ereg($pattern, $file))
if(strpos($file,'.')0) {
$file_array = array($file);
sort ($file_array);
foreach($file_array as $key = $value) {
echo option value=\$value\.$value./option;
}
}
}
echo /select;
closedir($dh);
}
}
?
You have a number of things you need to look at here. First, you don't have a final
closing brace for your opening if() statement. Second, you're outputting the
option tags INSIDE the while loop that reads the directory, so for every file
you read your options list will get bigger. Well, it would, but you're also not using
the right array append method; it should be:
$file_array[] = $file;
Next, you don't want to sort the array every time you add a file to it - just
do it once when you're done.
Try this:
?php
$pattern = .html*|.php*;
if (is_dir(files/) $dh = opendir(files/)) {
echo 'select name=file size=8';
while (($file = readdir($dh)) !== false) {
if (!ereg($pattern, $file)) continue;
if(strpos($file,'.')1) continue;
$file_array[] = $file;
}
sort ($file_array);
foreach($file_array as $value) {
echo 'option value=' . $value . '' . $value . '/option';
}
echo /select;
closedir($dh);
}
?
Syntax check is left as an exe3rcise for the student. =)
Regards,
Chad
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Re: [PHP] Sorting files in a directory
Steve Marquez wrote:
Greetings,
I have some code that opens a directory and displays the files. I want to
display the files in Alphabetical order.
I know this code does not work, but I was curious if someone can take a look
and tell me what is wrong? Thank you so much.
[ I hope the indenting is because you're posting to the list -
tabs/spaces make it a lot easier to follow what's going on ]
You have this:
$file_array = array($file);
sort ($file_array);
foreach($file_array as $key = $value) {
echo option value=\$value\.$value./option;
}
You're sorting one element of an array and then printing it out.
Not what you want.
Try this cut down version:
http://pastebin.com/m5bcadd77
Also note that in your example, if a directory can't be opened for
whatever reason, then you don't get a select box at all - is that what
you want to do?
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Re: [PHP] sorting via PHP or MySQL?
On Thu, May 10, 2007 1:00 pm, James Tu wrote:
(I've cross posted at the MySQL list as well)
Here's an example with a simple table:
describe collection;
+--+-+--+-
+-++
| Field| Type| Null | Key |
Default | Extra |
+--+-+--+-
+-++
| id | bigint(20) unsigned | | PRI |
NULL| auto_increment |
| receiver_id | bigint(20) unsigned | | MUL |
0 ||
| set_type_id | int(2) unsigned | | |
0 ||
| card_id | int(3) unsigned | | |
0 ||
| completed_set_id | bigint(20) unsigned | | |
0 ||
| created_on_gmt | datetime| | | -00-00
00:00:00 ||
+--+-+--+-
+-++
I want to end up with two PHP arrays. One for set_type_id = 22 and
one for set_type_id=21.
(1) one query method:
SELECT * from collection WHERE set_type_id=22 OR set_type_id=21;
...do query...
while( $row = $this-db-fetch_array_row() ){
/*
if ($row['set_type_id'] == 21){
$array_a[] = $row;
} else {
$array_b[] = $row;
}
*/
$array[$row['set_type_id']][] = $row;
}
var_dump($array);
You'll have one array of all the 21s, and one of all the 22s.
Which method is better? Take a hit using MySQL or take a hit using
PHP?
Honestly, is really doesn't make a damn bit of difference unless you
have ZILLIONS of records in the first place, in which case you
shouldn't be sucking them all down at once anyway...
So write whatever you can figure out what's going on next month/year
without beating your head against the wall trying to read your own
code.
Worry about optimizing only after you identify bottlenecks.
Anything else is optimize-wankery.
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RE: [PHP] sorting via PHP or MySQL?
James Tu wrote:
(I've cross posted at the MySQL list as well)
Here's an example with a simple table:
describe collection;
+--+-+--+-
+-++
Field| Type| Null | Key |
Default | Extra |
+--+-+--+-
+-++
id | bigint(20) unsigned | | PRI |
NULL| auto_increment |
receiver_id | bigint(20) unsigned | | MUL |
0 ||
set_type_id | int(2) unsigned | | |
0 ||
card_id | int(3) unsigned | | |
0 ||
completed_set_id | bigint(20) unsigned | | |
0 ||
created_on_gmt | datetime| | | -00-00
00:00:00 ||
+--+-+--+-
+-++
I want to end up with two PHP arrays. One for set_type_id = 22 and
one for set_type_id=21.
(1) one query method:
SELECT * from collection WHERE set_type_id=22 OR set_type_id=21;
...do query... while( $row = $this-db-fetch_array_row() ){
if ($row['set_type_id'] == 21){
$array_a[] = $row;
} else {
$array_b[] = $row;
}
}
(2) two query method:
SELECT * from collection WHERE set_type_id=22;
...do query...
while( $row = $this-db-fetch_array_row() ){
$array_a[] = $row;
}
SELECT * from collection WHERE set_type_id=21;
...do query...
while( $row = $this-db-fetch_array_row() ){
$array_b[] = $row;
}
Which method is better? Take a hit using MySQL or take a hit using
PHP?
-James
I really don't think you'd notice any difference, unless your table contains
a large amount of data and is not properly indexed. And if that were the
case, you'd notice a hit on just one query anyway.
I'd stick with the 2 query model, but instead of creating arrays, just loop
through the query results to output your data, no sense looping to make an
array when you're just going to end up looping through the array to output;
that seems redundant to me :P
Just my $.02
-B
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Re: [PHP] sorting via PHP or MySQL?
On Thu, 2007-05-10 at 14:00 -0400, James Tu wrote:
(I've cross posted at the MySQL list as well)
Here's an example with a simple table:
describe collection;
+--+-+--+-
+-++
| Field| Type| Null | Key |
Default | Extra |
+--+-+--+-
+-++
| id | bigint(20) unsigned | | PRI |
NULL| auto_increment |
| receiver_id | bigint(20) unsigned | | MUL |
0 ||
| set_type_id | int(2) unsigned | | |
0 ||
| card_id | int(3) unsigned | | |
0 ||
| completed_set_id | bigint(20) unsigned | | |
0 ||
| created_on_gmt | datetime| | | -00-00
00:00:00 ||
+--+-+--+-
+-++
I want to end up with two PHP arrays. One for set_type_id = 22 and
one for set_type_id=21.
(1) one query method:
SELECT * from collection WHERE set_type_id=22 OR set_type_id=21;
...do query...
while( $row = $this-db-fetch_array_row() ){
if ($row['set_type_id'] == 21){
$array_a[] = $row;
} else {
$array_b[] = $row;
}
}
(2) two query method:
SELECT * from collection WHERE set_type_id=22;
...do query...
while( $row = $this-db-fetch_array_row() ){
$array_a[] = $row;
}
SELECT * from collection WHERE set_type_id=21;
...do query...
while( $row = $this-db-fetch_array_row() ){
$array_b[] = $row;
}
Which method is better? Take a hit using MySQL or take a hit using PHP?
Single query method is superior in your example.
Cheers,
Rob.
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Re: [PHP] sorting via PHP or MySQL?
A somewhat more extensible version of the 1 query method:
http://www.garfieldtech.com/blog/php-group-by
If you will only ever have 2 values there, then either method is probably
fine. The php group by method (above) is more extensible if you're going
to have a variable or arbitrary number of groups, though.
Cheers.
On Thursday 10 May 2007, James Tu wrote:
(I've cross posted at the MySQL list as well)
Here's an example with a simple table:
describe collection;
+--+-+--+-
+-++
| Field| Type| Null | Key |
Default | Extra |
+--+-+--+-
+-++
| id | bigint(20) unsigned | | PRI |
NULL| auto_increment |
| receiver_id | bigint(20) unsigned | | MUL |
0 ||
| set_type_id | int(2) unsigned | | |
0 ||
| card_id | int(3) unsigned | | |
0 ||
| completed_set_id | bigint(20) unsigned | | |
0 ||
| created_on_gmt | datetime| | | -00-00
00:00:00 ||
+--+-+--+-
+-++
I want to end up with two PHP arrays. One for set_type_id = 22 and
one for set_type_id=21.
(1) one query method:
SELECT * from collection WHERE set_type_id=22 OR set_type_id=21;
...do query...
while( $row = $this-db-fetch_array_row() ){
if ($row['set_type_id'] == 21){
$array_a[] = $row;
} else {
$array_b[] = $row;
}
}
(2) two query method:
SELECT * from collection WHERE set_type_id=22;
...do query...
while( $row = $this-db-fetch_array_row() ){
$array_a[] = $row;
}
SELECT * from collection WHERE set_type_id=21;
...do query...
while( $row = $this-db-fetch_array_row() ){
$array_b[] = $row;
}
Which method is better? Take a hit using MySQL or take a hit using PHP?
-James
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Re: [PHP] sorting multi array
Jon, I would suggest that you should have a look at the function array_multisort. See the manual for details on what this function is capable of. //frank 25 apr 2007 kl. 01.58 skrev Jon Bennett: hi, I have the following array, which I need to sort by quantity... Array ( [2408] = Array ( [name] = Havaianas Top Pink Crystal [size] = 5 (37/38) [quantity] = 4 ) [3388] = Array ( [name] = Havaianas Brazil Silver [size] = 6/7 (39/40) [quantity] = 6 ) [2666] = Array ( [name] = Havaianas Brasil Black [size] = 8/9 (41/42) [quantity] = 1 ) [3210] = Array ( [name] = Havaianas Margaridas Yellow [size] = 5 (37/38) [quantity] = 1 ) [2552] = Array ( [name] = Havaianas Flash White [size] = 5 (37/38) [quantity] = 1 ) ) I need to keep the indexes if poss. Many thanks, jon -- jon bennett t: +44 (0) 1225 341 039 w: http://www.jben.net/ iChat (AIM): jbendotnet Skype: jon-bennett -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] sorting multi array
I have the following array, which I need to sort by quantity...
I need to keep the indexes if poss.
This may not be the most elegant solution. Let's call your array
$origArray
$tmpArray = array();
foreach( $origArray as $elKey = $elArray ) {
$tmpArray[$elArray['quantity']] = $elKey;
}
if( ksort( $tmpArray )) {
$sortedArray = array();
foreach( $tmpArray as $elKey ) {
$sortedArray[$elKey] = $origArray[$elKey];
}
echo 'Original: pre' . print_r( $origArray, TRUE ) '/prebr';
echo 'Sorted: pre' . print_r( $sortedArray, TRUE ) '/pre';
} else {
echo 'Sorry, couldn\'t sort';
}
thnx,
Chris
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RE: [PHP] sorting multi array
2007. 04. 25, szerda keltezéssel 11.39-kor Chris Boget ezt írta:
I have the following array, which I need to sort by quantity...
I need to keep the indexes if poss.
This may not be the most elegant solution. Let's call your array
$origArray
$tmpArray = array();
foreach( $origArray as $elKey = $elArray ) {
$tmpArray[$elArray['quantity']] = $elKey;
}
if( ksort( $tmpArray )) {
$sortedArray = array();
foreach( $tmpArray as $elKey ) {
$sortedArray[$elKey] = $origArray[$elKey];
}
echo 'Original: pre' . print_r( $origArray, TRUE ) '/prebr';
echo 'Sorted: pre' . print_r( $sortedArray, TRUE ) '/pre';
} else {
echo 'Sorry, couldn\'t sort';
}
this won't work if he has the same quantity for several keys, I think
greets
Zoltán Németh
thnx,
Chris
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Re: [PHP] sorting multi array
this won't work if he has the same quantity for several keys, I think
Yes, you are correct. If that is the case, then you would just need to
change the following line
$tmpArray[$elArray['quantity']] = $elKey;
to
$tmpArray[$elArray['quantity']][] = $elKey;
then change logic in this loop:
foreach( $tmpArray as $elKey ) {
to handle the additional array. If additional sorting needs to occur for
those keys that have the same quantity then I think recursion will be in
order.
thnx,
Chris
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Re: [PHP] sorting multi array
array_multisort accepts column arrays but here you try to sort row based
arrays.
try this:
?
class ArrayUtility
{
/* Sorts an array by a member */
static private $sortMember;
static function sortByMember($array, $member)
{
self::$sortMember = $member;
usort($array, array('ArrayUtility', 'compareMember'));
}
static function compareMember($a, $b)
{
return $a[self::$sortMember] $b[self::$sortMember];
}
}
ArrayUtility::sortByMember($array, 'quantity');
?
Am 25.04.2007, 12:36 Uhr, schrieb Frank Arensmeier
[EMAIL PROTECTED]:
Jon, I would suggest that you should have a look at the function
array_multisort. See the manual for details on what this function is
capable of.
//frank
25 apr 2007 kl. 01.58 skrev Jon Bennett:
hi,
I have the following array, which I need to sort by quantity...
Array
(
[2408] = Array
(
[name] = Havaianas Top Pink Crystal
[size] = 5 (37/38)
[quantity] = 4
)
[3388] = Array
(
[name] = Havaianas Brazil Silver
[size] = 6/7 (39/40)
[quantity] = 6
)
[2666] = Array
(
[name] = Havaianas Brasil Black
[size] = 8/9 (41/42)
[quantity] = 1
)
[3210] = Array
(
[name] = Havaianas Margaridas Yellow
[size] = 5 (37/38)
[quantity] = 1
)
[2552] = Array
(
[name] = Havaianas Flash White
[size] = 5 (37/38)
[quantity] = 1
)
)
I need to keep the indexes if poss.
Many thanks,
jon
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Re: [PHP] sorting multi array
Jon Bennett wrote:
hi,
I have the following array, which I need to sort by quantity...
Array
(
[2408] = Array
(
[name] = Havaianas Top Pink Crystal
[size] = 5 (37/38)
[quantity] = 4
)
[3388] = Array
(
[name] = Havaianas Brazil Silver
[size] = 6/7 (39/40)
[quantity] = 6
)
[2666] = Array
(
[name] = Havaianas Brasil Black
[size] = 8/9 (41/42)
[quantity] = 1
)
[3210] = Array
(
[name] = Havaianas Margaridas Yellow
[size] = 5 (37/38)
[quantity] = 1
)
[2552] = Array
(
[name] = Havaianas Flash White
[size] = 5 (37/38)
[quantity] = 1
)
)
I need to keep the indexes if poss.
Many thanks,
jon
This works for me:
function cmp($a, $b)
{
$aq = $a['quantity'];
$bq = $b['quantity'];
if ($a == $b) {
return 0;
}
return ($aq $bq) ? -1 : 1;
}
uasort($data, cmp);
To reverse the sort order: return ($aq $bq) ? -1 : 1;
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Re: [PHP] sorting multi array
Search the archives for multisort array and you should find this thread a few thousand times... On Tue, April 24, 2007 6:58 pm, Jon Bennett wrote: hi, I have the following array, which I need to sort by quantity... Array ( [2408] = Array ( [name] = Havaianas Top Pink Crystal [size] = 5 (37/38) [quantity] = 4 ) [3388] = Array ( [name] = Havaianas Brazil Silver [size] = 6/7 (39/40) [quantity] = 6 ) [2666] = Array ( [name] = Havaianas Brasil Black [size] = 8/9 (41/42) [quantity] = 1 ) [3210] = Array ( [name] = Havaianas Margaridas Yellow [size] = 5 (37/38) [quantity] = 1 ) [2552] = Array ( [name] = Havaianas Flash White [size] = 5 (37/38) [quantity] = 1 ) ) I need to keep the indexes if poss. Many thanks, jon -- jon bennett t: +44 (0) 1225 341 039 w: http://www.jben.net/ iChat (AIM): jbendotnet Skype: jon-bennett -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- Some people have a gift link here. Know what I want? I want you to buy a CD from some indie artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting a multidimensional array
# [EMAIL PROTECTED] / 2007-02-08 14:08:13 +: Hi all. I am building an online events directory and as part of the system users can search for events by date, category etc. The logic involved in finding events that match the user-entered dates works like so: 1. we create a range of dates from the start and end dates specified by the user 2. we then poll the database for any events that encompass or intersect this range (using the start_date and end_date fields from events table). 3. we then find out the frequency of the event ie weekly, monthly and then map out its lifetime. 4. we then go through those dates, and for any that match a date in the user range, the event on that date (ie all it details, name, venue, date, start time etc) is added to an array. Order in the database. SELECT ... ORDER BY. -- How many Vietnam vets does it take to screw in a light bulb? You don't know, man. You don't KNOW. Cause you weren't THERE. http://bash.org/?255991 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting a multidimensional array
Thanks for that - can't do that as all I know in the database is the start
and end date for each event (so I don't have to create mapping tables and
perform massive joins), the rest is handle dynamically.
I think I can do it using usort, this seems to work, any comments?
function compare($x, $y) {
if (($x['date'] == $y['date']) ($x['start_time'] ==
$y['start_time'])) {
return 0;
} else if (($x['date'] == $y['date']) ($x['start_time']
$y['start_time'])) {
return -1;
} else if (($x['date'] == $y['date']) ($x['start_time']
$y['start_time'])) {
return 1;
} else if ($x['date'] $y['date']) {
return -1;
} else {
return 1;
}
}
Re: [PHP] Sorting a multidimensional array
array_multisort?
http://php.net/manual/en/function.array-multisort.php
hope that helps
Zoltán Németh
On cs, 2007-02-08 at 14:08 +, Dave Goodchild wrote:
Hi all. I am building an online events directory and as part of the system
users can search for events by date, category etc.
The logic involved in finding events that match the user-entered dates works
like so:
1. we create a range of dates from the start and end dates specified by the
user
2. we then poll the database for any events that encompass or intersect this
range (using the start_date and end_date fields from events table).
3. we then find out the frequency of the event ie weekly, monthly and then
map out its lifetime.
4. we then go through those dates, and for any that match a date in the user
range, the event on that date (ie all it details, name, venue, date, start
time etc) is added to an array.
...etc etc
So we eventually have a large multidimensional array whose elements contain
arrays of events that fall on a specific date.
I am using usort to ensure the events are sorted by date, but I also want to
sort by time, for instance if there are five events on one day I want to
sort them by start_time.
Here's an example of how the event array looks:
element [0] contains an array as follows ('date', 'name' venue',
'start_time', 'category...');
element [1] contains an array as follows ('date', 'name' venue',
'start_time', 'category...');
I tried using array_multisort but it didn't seem to do what I wanted. I want
to sort by date, then start_time if the dates are equivalent.
Any ideas?
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RE: [PHP] Sorting a multidimensional array
How about this:
http://uk.php.net/manual/en/function.array-multisort.php#53779
Edward
-Original Message-
From: Dave Goodchild [mailto:[EMAIL PROTECTED]
Sent: 08 February 2007 14:30
To: Roman Neuhauser
Cc: php-general@lists.php.net
Subject: Re: [PHP] Sorting a multidimensional array
Thanks for that - can't do that as all I know in the database is the start
and end date for each event (so I don't have to create mapping tables and
perform massive joins), the rest is handle dynamically.
I think I can do it using usort, this seems to work, any comments?
function compare($x, $y) {
if (($x['date'] == $y['date']) ($x['start_time'] ==
$y['start_time'])) {
return 0;
} else if (($x['date'] == $y['date']) ($x['start_time']
$y['start_time'])) {
return -1;
} else if (($x['date'] == $y['date']) ($x['start_time']
$y['start_time'])) {
return 1;
} else if ($x['date'] $y['date']) {
return -1;
} else {
return 1;
}
}
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Re: [PHP] Sorting issue
Paul's probably right.. putting the sorting values in a table would be eaiser to maintain. I don't know what I was thinking with the whole then you don't HAVE to create a table. Both ways work.. but especially if you think the positions may change, then it'll be tons easier to update if they're in a table. -TG = = = Original message = = = = = = Original message = = = I need to sort the results of a DB query based on the hierarchy of positions within an organization. Since they are not necessarily alphabetical, the best I can come up with is to assign a numerical value in a separate table to each position, and reference that to sort it. At 2/7/2007 01:10 PM, [EMAIL PROTECTED] wrote: Well, kind of ugly but you can do something like this: SELECT Position, CASE Position WHEN 'CEO' THEN 1 WHEN 'COO' THEN 2 WHEN 'CFO' THEN 3 WHEN 'HR' THEN 4 ELSE 99 END AS PositionSort FROM SomeTable ORDER BY PositionSort That way you're not creating a whole new table to store the sorting values. If I might offer alternative advice, I *would* create a separate table of positions sort sequence values, so that all the data can be edited in one mode (e.g., phpMyAdmin). If some of your data is in MySQL and some of it's embedded in a query in a PHP script, it will be a little bit more of a hassle to maintain and a little more cryptic for the next developer who has to figure out what you've done after you abruptly run off to Tahiti. SELECT Positions.Sort, Employees.Position, Employees.LastName, etc FROM Employees, Positions WHERE Employees.Position = Positions.Position ORDER BY Positions.Sort, Employees.LastName (Assuming more than one employee per position, I figure you'd want a secondary sort criterion.) Regards, Paul __ Paul Novitski Juniper Webcraft Ltd. http://juniperwebcraft.com ___ Sent by ePrompter, the premier email notification software. Free download at http://www.ePrompter.com. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting issue
Well, kind of ugly but you can do something like this: SELECT Position, CASE Position WHEN 'CEO' THEN 1 WHEN 'COO' THEN 2 WHEN 'CFO' THEN 3 WHEN 'HR' THEN 4 ELSE 99 END AS PositionSort FROM SomeTable ORDER BY PositionSort That way you're not creating a whole new table to store the sorting values. You can also just put the CASE sequence in your ORDER BY (I believe) so it doesn't get returned as a value. Didn't test that, but it's a little thing either way. -TG = = = Original message = = = I have been trying to figure out how to get this to work for a couple of days. I need to sort the results of a DB query based on the hierarchy of positions within an organization. Since they are not necessarily alphabetical, the best I can come up with is to assign a numerical value in a separate table to each position, and reference that to sort it. Is this the best way to do this? Or is there some other trick someone can clue me in on? My code now runs the query, and with a while ($row = mysql_fetch_assoc($result)) *put results into an array* statement I put each entry into an array then I sort it like so. array_multisort($array); $count = 0; while (isset ($array[$count])) *display results in a table* $count++; Thanks, Don ___ Sent by ePrompter, the premier email notification software. Free download at http://www.ePrompter.com. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting issue
= = = Original message = = = I need to sort the results of a DB query based on the hierarchy of positions within an organization. Since they are not necessarily alphabetical, the best I can come up with is to assign a numerical value in a separate table to each position, and reference that to sort it. At 2/7/2007 01:10 PM, [EMAIL PROTECTED] wrote: Well, kind of ugly but you can do something like this: SELECT Position, CASE Position WHEN 'CEO' THEN 1 WHEN 'COO' THEN 2 WHEN 'CFO' THEN 3 WHEN 'HR' THEN 4 ELSE 99 END AS PositionSort FROM SomeTable ORDER BY PositionSort That way you're not creating a whole new table to store the sorting values. If I might offer alternative advice, I *would* create a separate table of positions sort sequence values, so that all the data can be edited in one mode (e.g., phpMyAdmin). If some of your data is in MySQL and some of it's embedded in a query in a PHP script, it will be a little bit more of a hassle to maintain and a little more cryptic for the next developer who has to figure out what you've done after you abruptly run off to Tahiti. SELECT Positions.Sort, Employees.Position, Employees.LastName, etc FROM Employees, Positions WHERE Employees.Position = Positions.Position ORDER BY Positions.Sort, Employees.LastName (Assuming more than one employee per position, I figure you'd want a secondary sort criterion.) Regards, Paul __ Paul Novitski Juniper Webcraft Ltd. http://juniperwebcraft.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting multidimensional arrays
On Thu, 2006-11-16 at 15:28 +, Dave Goodchild wrote: Hi all. I have a multidimensional array here: Bums [name]= string(13) Tits And Bums [3]= string(19) The Pleasure [--SNIP--] ...which comprises a set of returned results for an events search - with the date computed dynamically and added to the end of the array in each case. What I want to do with this data is display the array in an html table, sorted by the date. At the moment the display shows each event from earliest to last date, then the next event from earliest to last etc. What I want to do is display all the data from earliest to last date - my question is, how do I sort the entire array based on the date value in the second level array? usort() Cheers, Rob. -- .. | InterJinn Application Framework - http://www.interjinn.com | :: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting multidimensional arrays
Result. Cheers! On 11/16/06, Robert Cummings [EMAIL PROTECTED] wrote: On Thu, 2006-11-16 at 15:28 +, Dave Goodchild wrote: Hi all. I have a multidimensional array here: Bums [name]= string(13) Tits And Bums [3]= string(19) The Pleasure [--SNIP--] ...which comprises a set of returned results for an events search - with the date computed dynamically and added to the end of the array in each case. What I want to do with this data is display the array in an html table, sorted by the date. At the moment the display shows each event from earliest to last date, then the next event from earliest to last etc. What I want to do is display all the data from earliest to last date - my question is, how do I sort the entire array based on the date value in the second level array? usort() Cheers, Rob. -- .. | InterJinn Application Framework - http://www.interjinn.com | :: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `' -- http://www.web-buddha.co.uk
Re: [PHP] Sorting MySQL queries
On 07/11/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: you really need to deal with this issue at the database design/data entry level. doing things on the sort to exclude (otherwise undefined) initial articles (as some have suggested) is very maintenance heavy as you have to update the sort portion for every language your data are entered in. additionally, an initial word that's an initial article in one language may not be in another. at the database design/data entry level the common approaches include: - a separate field for initial articles - separate sort and print fields - an initial article offset indicator that is used for sorting the first of these is probably the easiest and most portable. the last is easy, but probably the least portable. i consider the separate print/sort fields to be the least desirable since it's a lot of redundant data that has to be managed and maintained. in my experience, if you encounter a setup that doesn't support the proper handling of initial articles it's best to fix things at the database/data entry level as soon as possible -- otherwise the resolution just gets more expensive (however you define that). Although I wouldn't have known to define it as such, I also don't like the idea of redundant data littering the DB. But it does seems to be the easiest method to implement as far as coding, and the fastest way to retrieve the data. Dotan Cohen http://what-is-what.com/what_is/xml.html http://essentialinux.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting MySQL queries
At 3:13 PM +0200 11/5/06, Dotan Cohen wrote: I have a list of subjects, such as Linux, Open Source, and the World Wide Web. The subjects are stored in a database and being retrieved via php. I currently organize them alphabetically with SQL's ORDER BY ASC argument, however, if there is a preceding the or a then that is considered as part of the alphabetical order. Thus, all the subjects starting with the are grouped together, as are the subjects starting with a . How can I order by ascending, without taking the preceding the or a into account? Thanks in advance. Dotan Cohen Dotan: In your table, set up a sort field. That way there will be no interpolation as to what you want. tedd -- --- http://sperling.com http://ancientstones.com http://earthstones.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting MySQL queries
On 11/5/06, Roman Neuhauser [EMAIL PROTECTED] wrote: If you used PostgreSQL I'd suggest a functional index and ordering on the function... Does MySQL have anything like this? CREATE FUNCTION fn(TEXT) RETURNS TEXT IMMUTABLE STRICT LANGUAGE SQL AS $$ SELECT regexp_replace($1, '^(?:(?:a|the)[[:space:]]+)', '', 'i'); $$; CREATE INDEX ON table(fn(subject)); Thats rather nifty, i dont think you can do that with mysql, but you could achieve something close to that with a trigger for insert/update to apply the regex to a different field that is used for sorting. The other option would make a policy to put , The or , A at the end of the string a simple function to render the text without the comma at the end would be simple to do. Curt -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting MySQL queries
On Sun, November 5, 2006 7:13 am, Dotan Cohen wrote: I have a list of subjects, such as Linux, Open Source, and the World Wide Web. The subjects are stored in a database and being retrieved via php. I currently organize them alphabetically with SQL's ORDER BY ASC argument, however, if there is a preceding the or a then that is considered as part of the alphabetical order. Thus, all the subjects starting with the are grouped together, as are the subjects starting with a . How can I order by ascending, without taking the preceding the or a into account? ** Example: Now, the list is ordeded like this: a Distribution a Text Editor a Virus Bluetooth Copyleft DRM Fedora Firefox However, I'd like it to be ordered like this: Bluetooth Copyleft a Distribution DRM Fedora Firefox a Text Editor a Virus Current code: $query = SELECT subject FROM table ORDER BY subject asc; $result = mysql_query($query); I forget the SQL 'CASE' syntax, but it goes something like this: $query = SELECT subject, case when substring(lower(subject, 0, 4) = 'the ') then substring(subject, 4) when substring(lower(subject, 0, 3) = 'an ' then substring(subject, 3) when substring(lower(subject, 0, 2) = 'a ') then substring(subject, 2) else subject) as subject_alpha FROM table ORDER BY subject_alpha; 'Course, that renders ineffective any index you got on 'subject', almost for sure. If the table is HUGE and/or performance is an issue, you could set up a second field called subject_alpha which holds the alphabetized version. Then you need to be sure it's always kept in sync by your application. Or triggers and all that in later MySQL. Actually, super-recent MySQL has user-defined functions, I think, so the previous solution by another post may be better in that case. I do not think there is a magic built-in easy MySQL function for this, though you never know unless you read MySQL docs and ask on the MySQL mailing list. (Hint, hint.) -- Some people have a gift link here. Know what I want? I want you to buy a CD from some starving artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting MySQL queries
On 06/11/06, Richard Lynch [EMAIL PROTECTED] wrote: On Sun, November 5, 2006 7:13 am, Dotan Cohen wrote: I have a list of subjects, such as Linux, Open Source, and the World Wide Web. The subjects are stored in a database and being retrieved via php. I currently organize them alphabetically with SQL's ORDER BY ASC argument, however, if there is a preceding the or a then that is considered as part of the alphabetical order. Thus, all the subjects starting with the are grouped together, as are the subjects starting with a . How can I order by ascending, without taking the preceding the or a into account? ** Example: Now, the list is ordeded like this: a Distribution a Text Editor a Virus Bluetooth Copyleft DRM Fedora Firefox However, I'd like it to be ordered like this: Bluetooth Copyleft a Distribution DRM Fedora Firefox a Text Editor a Virus Current code: $query = SELECT subject FROM table ORDER BY subject asc; $result = mysql_query($query); I forget the SQL 'CASE' syntax, but it goes something like this: $query = SELECT subject, case when substring(lower(subject, 0, 4) = 'the ') then substring(subject, 4) when substring(lower(subject, 0, 3) = 'an ' then substring(subject, 3) when substring(lower(subject, 0, 2) = 'a ') then substring(subject, 2) else subject) as subject_alpha FROM table ORDER BY subject_alpha; 'Course, that renders ineffective any index you got on 'subject', almost for sure. If the table is HUGE and/or performance is an issue, you could set up a second field called subject_alpha which holds the alphabetized version. Then you need to be sure it's always kept in sync by your application. Or triggers and all that in later MySQL. Actually, super-recent MySQL has user-defined functions, I think, so the previous solution by another post may be better in that case. I do not think there is a magic built-in easy MySQL function for this, though you never know unless you read MySQL docs and ask on the MySQL mailing list. (Hint, hint.) I just subscribed back to the MySQL list (unsubscribed a few months ago) to ask the question. If there's no super-smart way to do it, then I'll use the pseudo-subject field and sort on it. Performance-wise, I agree that it can't be beat. Thanks. Dotan Cohen http://lyricslist.com/ http://what-is-what.com/what_is/xml.html -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting MySQL queries
On Monday 06 November 2006 08:15, clive wrote: Current code: $query = SELECT subject FROM table ORDER BY subject asc; $result = mysql_query($query); I dont seen any php code to do any sorting,just a mysql query, perhaps a mysql list or maybe you should try doing it in php yourself first. Not that I know the answer, but mysql does have a substring function, perhaps it can help. substring is quite powerful. Never tried one of those though -- --- Børge Kennel Arivene http://www.arivene.net --- -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting MySQL queries
# [EMAIL PROTECTED] / 2006-11-05 15:13:19 +0200: I have a list of subjects, such as Linux, Open Source, and the World Wide Web. The subjects are stored in a database and being retrieved via php. I currently organize them alphabetically with SQL's ORDER BY ASC argument, however, if there is a preceding the or a then that is considered as part of the alphabetical order. Thus, all the subjects starting with the are grouped together, as are the subjects starting with a . How can I order by ascending, without taking the preceding the or a into account? Current code: $query = SELECT subject FROM table ORDER BY subject asc; $result = mysql_query($query); If you used PostgreSQL I'd suggest a functional index and ordering on the function... Does MySQL have anything like this? CREATE FUNCTION fn(TEXT) RETURNS TEXT IMMUTABLE STRICT LANGUAGE SQL AS $$ SELECT regexp_replace($1, '^(?:(?:a|the)[[:space:]]+)', '', 'i'); $$; CREATE INDEX ON table(fn(subject)); SELECT subject FROM table ORDER BY fn(subject) ASC; -- How many Vietnam vets does it take to screw in a light bulb? You don't know, man. You don't KNOW. Cause you weren't THERE. http://bash.org/?255991 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting MySQL queries
Current code: $query = SELECT subject FROM table ORDER BY subject asc; $result = mysql_query($query); I dont seen any php code to do any sorting,just a mysql query, perhaps a mysql list or maybe you should try doing it in php yourself first. Not that I know the answer, but mysql does have a substring function, perhaps it can help. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting Multidimensional Array
On Tue, October 31, 2006 11:10 am, Keith Spiller wrote:
RE: Sorting Multidimensional Array
I'm trying to sort a multidimensional array. The data was taken from
a mysql query:
$myrow = mysql_fetch_row($result) {
query[] = $myrow;
}
The purpose is to retrieve the table data and manually add a record,
then sort ASC by the startdate which is the forth field...
Something like:
$test = array_multisort($query, $key = '$query[4]');
Any help would be greatly appreciated. Thanks,
Don't do that. :-)
For starters, sorting in PHP is MUCH less efficient than in a DB.
Secondly, getting multi-dimensional (sic) arrays in PHP to sort like
you want generates a ton of traffic here, so it must be hard. :-)
You can do somethig like this:
(SELECT x, y, z FROM real_data
UNION
SELECT 'manually', 'inserted', 'data' as z
)
ORDER BY z
And achieve MUCH better results with far less headache.
If 'z' is indexed in real_data, add another ORDER BY z right before
the UNION -- That will probably make it very fast/easy for the DB to
splice in your manually-inserted 'z' value.
--
Some people have a gift link here.
Know what I want?
I want you to buy a CD from some starving artist.
http://cdbaby.com/browse/from/lynch
Yeah, I get a buck. So?
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Re: [PHP] Sorting Multidimensional Array
Thanks Richard,
But wouldn't order by z interfere with my original order by values?
My code is as follows:
$fields1 = ID, Title, Label, Location, Start, End, Time, ;
$fields1 .= Description, Organization, Department, Contact, ;
$fields1 .= Phone, Email, Global, Board, Committee, Status, TBD_Time ;
$command = SELECT $fields1, TO_DAYS(End) - TO_DAYS(Start) + 1 AS Days
;
$command .= FROM $tablename ;
$command .= $WHERETXT ORDER BY $sortby $sortorder ;
I just need to add a new record, but I have to use PHP because the Start and
End
dates for that record must match the current month...
If I could add the record to the Select statement as you suggest that would
be wonderful.
Keith
- Original Message -
From: Richard Lynch [EMAIL PROTECTED]
To: Keith Spiller [EMAIL PROTECTED]
Cc: php-general@lists.php.net
Sent: Tuesday, October 31, 2006 10:48 AM
Subject: Re: [PHP] Sorting Multidimensional Array
On Tue, October 31, 2006 11:10 am, Keith Spiller wrote:
RE: Sorting Multidimensional Array
I'm trying to sort a multidimensional array. The data was taken from
a mysql query:
$myrow = mysql_fetch_row($result) {
query[] = $myrow;
}
The purpose is to retrieve the table data and manually add a record,
then sort ASC by the startdate which is the forth field...
Something like:
$test = array_multisort($query, $key = '$query[4]');
Any help would be greatly appreciated. Thanks,
Don't do that. :-)
For starters, sorting in PHP is MUCH less efficient than in a DB.
Secondly, getting multi-dimensional (sic) arrays in PHP to sort like
you want generates a ton of traffic here, so it must be hard. :-)
You can do somethig like this:
(SELECT x, y, z FROM real_data
UNION
SELECT 'manually', 'inserted', 'data' as z
)
ORDER BY z
And achieve MUCH better results with far less headache.
If 'z' is indexed in real_data, add another ORDER BY z right before
the UNION -- That will probably make it very fast/easy for the DB to
splice in your manually-inserted 'z' value.
--
Some people have a gift link here.
Know what I want?
I want you to buy a CD from some starving artist.
http://cdbaby.com/browse/from/lynch
Yeah, I get a buck. So?
--
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Re: [PHP] sorting array after array_count_values
On Tue, August 15, 2006 9:01 am, [EMAIL PROTECTED] wrote: I have an array of products $products $products = array_count_values($products); now I have an array where $key is product number and $value is how many times I have such a product in the array. I want to sort this new array that product with the most duplicates are on the first place, but what ever I use (rsort, krsort,..) i loose product numbers (key). http://php.net/asort -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sorting in array
For starters, the function is supposed to return 0 for countries that
are equal.
As it stands now, it's going to return 1 / -1 randomly based on which
arg happens to be $a versus $b.
That's bad.
For some implementations of shuffle/sort routines, it will actually
crash.
I forget which implementation does this, but it's got to do with
caching the comparison result in a B-tree and then walking the tree
assuming that the comparison will be consistent...
Anyway, as far as doesn't work goes, you'd have to give us more info
about how it's not working...
On Mon, July 31, 2006 1:56 am, weetat wrote:
Hi ,
Doesn't work .
Any ideas ?
Thanks
Peter Lauri wrote:
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
if($country1=='') return 1;
else return ($country1 $country2) ? -1 : 1;
}
-Original Message-
From: weetat [mailto:[EMAIL PROTECTED]
Sent: Monday, July 31, 2006 12:32 PM
To: php-general@lists.php.net
Subject: [PHP] sorting in array
Hi all ,
I have array value as shown below, i have paste my test php code
below:
I have problem when doing usort() when 'country' = '', i would
like to
display records where country = '' last. Any ideas how to do that ?
Thanks
$arraytest= array(
array
(
'country' = '',
)
,
array
(
'country' = 'Thailand',
)
,
array
(
'country' = 'Singapore',
)
,
array
(
'country' = 'Singapore',
)
,
array
(
'country' = '',
)
,
array
(
'country' = '',
)
,
array
(
'country' = '',
)
);
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
return ($country1 $country2) ? -1 : 1;
}
usort($arraytest,cmpcountry);
while(list($name,$value)=each($arraytest)){
echo $name.brbr;
while(list($n,$v) = each($arraytest[$name])){
echo $v.brbr;
}
}
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Re: [PHP] sorting in array
Hi ,
Doesn't work .
Any ideas ?
Thanks
Peter Lauri wrote:
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
if($country1=='') return 1;
else return ($country1 $country2) ? -1 : 1;
}
-Original Message-
From: weetat [mailto:[EMAIL PROTECTED]
Sent: Monday, July 31, 2006 12:32 PM
To: php-general@lists.php.net
Subject: [PHP] sorting in array
Hi all ,
I have array value as shown below, i have paste my test php code below:
I have problem when doing usort() when 'country' = '', i would like to
display records where country = '' last. Any ideas how to do that ?
Thanks
$arraytest= array(
array
(
'country' = '',
)
,
array
(
'country' = 'Thailand',
)
,
array
(
'country' = 'Singapore',
)
,
array
(
'country' = 'Singapore',
)
,
array
(
'country' = '',
)
,
array
(
'country' = '',
)
,
array
(
'country' = '',
)
);
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
return ($country1 $country2) ? -1 : 1;
}
usort($arraytest,cmpcountry);
while(list($name,$value)=each($arraytest)){
echo $name.brbr;
while(list($n,$v) = each($arraytest[$name])){
echo $v.brbr;
}
}
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Re: [PHP] sorting in array
At 10:31 PM 7/30/2006, weetat wrote:
I have problem when doing usort() when 'country' = '', i would
like to display records where country = '' last. Any ideas how to do that ?
...
$arraytest= array(
array
(
'country' = '',
)
,
array
(
'country' = 'Thailand',
)
...
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
return ($country1 $country2) ? -1 : 1;
}
Weetat,
You can sort the blank fields to the end simply by forcing their
evaluated values in your usort callback function:
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
if ($country1 == '') $country1 = zzz;
if ($country2 == '') $country2 = zzz;
return ($country1 $country2) ? -1 : 1;
}
...or, using ternary syntax:
function cmpcountry($a, $b)
{
$country1 = ($a['country'] == '') ? zzz : $a['country'];
$country2 = ($b['country'] == '') ? zzz : $b['country'];
return ($country1 $country2) ? -1 : 1;
}
Regards,
Paul
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RE: [PHP] sorting in array
At 05:40 PM 7/30/2006, Peter Lauri wrote:
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
if($country1=='') return 1;
else return ($country1 $country2) ? -1 : 1;
}
Good call, Peter; my suggestion was unnecessarily fat.
Weetat, both Peter's and my solutions do work -- see here:
http://juniperwebcraft.com/test/sortTest.php
source code:
http://juniperwebcraft.com/test/sortTest.txt
I could make that last statement just a bit simpler:
function cmpcountry($a, $b)
{
$country1 = ($a['country'] == '') ? zzz : $a['country'];
$country2 = ($b['country'] == '') ? zzz : $b['country'];
return ($country1 '' $country1 $country2) ? -1 : 1;
}
I'm curious to know why none of this code works properly if it
directly compares ($a['country'] $b['country']). Why are the
intermediate variables necessary?
Paul
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RE: [PHP] sorting in array
At 12:22 AM 7/31/2006, Paul Novitski wrote:
I could make that last statement just a bit simpler:
function cmpcountry($a, $b)
{
$country1 = ($a['country'] == '') ? zzz : $a['country'];
$country2 = ($b['country'] == '') ? zzz : $b['country'];
return ($country1 '' $country1 $country2) ? -1 : 1;
}
*Sigh* I shouldn't post this late at night. This is the comparison
function that works for me:
function cmpcountry($a, $b)
{
$country1 = ($a['country'] == '') ? zzz : $a['country'];
$country2 = ($b['country'] == '') ? zzz : $b['country'];
return ($country1 $country2) ? -1 : 1;
}
demo: http://juniperwebcraft.com/test/sortTest.php
code: http://juniperwebcraft.com/test/sortTest.txt
Paul
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Re: [PHP] sorting in array
Thanks Paul,
Very weird tried Peter's option, it doesn't work.
Btw , how to sort by ascending ?
Thanks
Paul Novitski wrote:
At 12:22 AM 7/31/2006, Paul Novitski wrote:
I could make that last statement just a bit simpler:
function cmpcountry($a, $b)
{
$country1 = ($a['country'] == '') ? zzz : $a['country'];
$country2 = ($b['country'] == '') ? zzz : $b['country'];
return ($country1 '' $country1 $country2) ? -1 : 1;
}
*Sigh* I shouldn't post this late at night. This is the comparison
function that works for me:
function cmpcountry($a, $b)
{
$country1 = ($a['country'] == '') ? zzz : $a['country'];
$country2 = ($b['country'] == '') ? zzz : $b['country'];
return ($country1 $country2) ? -1 : 1;
}
demo: http://juniperwebcraft.com/test/sortTest.php
code: http://juniperwebcraft.com/test/sortTest.txt
Paul
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Re: [PHP] sorting in array
At 01:14 AM 7/31/2006, weetat wrote:
Thanks Paul,
Very weird tried Peter's option, it doesn't work.
Btw , how to sort by ascending ?
Please explain what you mean. The current script DOES sort ascending
by country (except for the blank country fields which are placed at the end):
http://juniperwebcraft.com/test/sortTest.php
Singapore, Singapore, Thailand is an ascending sort.
Your original code also sorted ascending by country, but with the
blank countries at the front:
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
return ($country1 $country2) ? -1 : 1;
}
Paul
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RE: [PHP] sorting in array
And this for DESCending
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
if($country1=='' OR $country2=='') {
if($country1==$country2) return 0;
elseif($country1=='') return 1;
else return -1;
} else return ($country1 $country2) ? 1 : -1;
}
-Original Message-
From: weetat [mailto:[EMAIL PROTECTED]
Sent: Monday, July 31, 2006 3:15 PM
To: php-general@lists.php.net; Paul Novitski
Cc: php-general@lists.php.net
Subject: Re: [PHP] sorting in array
Thanks Paul,
Very weird tried Peter's option, it doesn't work.
Btw , how to sort by ascending ?
Thanks
Paul Novitski wrote:
At 12:22 AM 7/31/2006, Paul Novitski wrote:
I could make that last statement just a bit simpler:
function cmpcountry($a, $b)
{
$country1 = ($a['country'] == '') ? zzz : $a['country'];
$country2 = ($b['country'] == '') ? zzz : $b['country'];
return ($country1 '' $country1 $country2) ? -1 : 1;
}
*Sigh* I shouldn't post this late at night. This is the comparison
function that works for me:
function cmpcountry($a, $b)
{
$country1 = ($a['country'] == '') ? zzz : $a['country'];
$country2 = ($b['country'] == '') ? zzz : $b['country'];
return ($country1 $country2) ? -1 : 1;
}
demo: http://juniperwebcraft.com/test/sortTest.php
code: http://juniperwebcraft.com/test/sortTest.txt
Paul
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RE: [PHP] sorting in array
Sorry, I just woke up and just posted an reply without thinking, use this:
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
if($country1=='' OR $country2=='') {
if($country1==$country2) return 0;
elseif($country1=='') return 1;
else return -1;
} else return ($country1 $country2) ? -1 : 1;
}
/Peter
-Original Message-
From: Paul Novitski [mailto:[EMAIL PROTECTED]
Sent: Monday, July 31, 2006 1:57 PM
To: php-general@lists.php.net
Subject: Re: [PHP] sorting in array
At 10:31 PM 7/30/2006, weetat wrote:
I have problem when doing usort() when 'country' = '', i would
like to display records where country = '' last. Any ideas how to do that
?
...
$arraytest= array(
array
(
'country' = '',
)
,
array
(
'country' = 'Thailand',
)
...
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
return ($country1 $country2) ? -1 : 1;
}
Weetat,
You can sort the blank fields to the end simply by forcing their
evaluated values in your usort callback function:
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
if ($country1 == '') $country1 = zzz;
if ($country2 == '') $country2 = zzz;
return ($country1 $country2) ? -1 : 1;
}
...or, using ternary syntax:
function cmpcountry($a, $b)
{
$country1 = ($a['country'] == '') ? zzz : $a['country'];
$country2 = ($b['country'] == '') ? zzz : $b['country'];
return ($country1 $country2) ? -1 : 1;
}
Regards,
Paul
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Re: [PHP] sorting in array
weetat wrote: Hi all , I have array value as shown below, i have paste my test php code below: I have problem when doing usort() when 'country' = '', i would like to display records where country = '' last. Any ideas how to do that ? ... You might try searching the list's archive's. This question has been asked and answered several times before. http://aspn.activestate.com/ASPN/Mail/Message/php-general/3172783 http://aspn.activestate.com/ASPN/Mail/Message/php-general/3199536 http://aspn.activestate.com/ASPN/Mail/Message/php-general/3212898 one of the solutions offered: http://aspn.activestate.com/ASPN/Mail/Message/3172873 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] sorting in array
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
if($country1=='') return 1;
else return ($country1 $country2) ? -1 : 1;
}
-Original Message-
From: weetat [mailto:[EMAIL PROTECTED]
Sent: Monday, July 31, 2006 12:32 PM
To: php-general@lists.php.net
Subject: [PHP] sorting in array
Hi all ,
I have array value as shown below, i have paste my test php code below:
I have problem when doing usort() when 'country' = '', i would like to
display records where country = '' last. Any ideas how to do that ?
Thanks
$arraytest= array(
array
(
'country' = '',
)
,
array
(
'country' = 'Thailand',
)
,
array
(
'country' = 'Singapore',
)
,
array
(
'country' = 'Singapore',
)
,
array
(
'country' = '',
)
,
array
(
'country' = '',
)
,
array
(
'country' = '',
)
);
function cmpcountry($a, $b)
{
$country1 = $a['country'];
$country2 = $b['country'];
return ($country1 $country2) ? -1 : 1;
}
usort($arraytest,cmpcountry);
while(list($name,$value)=each($arraytest)){
echo $name.brbr;
while(list($n,$v) = each($arraytest[$name])){
echo $v.brbr;
}
}
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Re: [PHP] sorting array question
On 7/26/06, Angelo Zanetti [EMAIL PROTECTED] wrote:
Hi all,
So they way I want to sort these rows is by total, totalPaid,
totalUnpaid all descending.
Hi Angelo,
So the first question the list will ask is if the array of data is
coming from a database. Because then you'd be urged to perform the
sorting from within your database query.
Barring that, you can use the usort() function to create custom
sorting. What I've done below should do what you want, and I've tried
to generalize the functions a bit, so that you can mix descending and
ascending as you wish:
[code]
// Basic function for comparing arrays based on a particular column
function compareColumn($x, $y, $idx, $lessThan, $greaterThan)
{
if ( $x[$idx] == $y[$idx] )
return 0;
else if ( $x[$idx] $y[$idx] )
return $lessThan;
else
return $greaterThan;
}
// Calls compareColumn so that it sorts in descending order
function compareColumnDesc($x, $y, $idx)
{
return compareColumn($x, $y, $idx, 1, -1);
}
// Calls compareColumn so that it sorts in ascending order
function compareColumnAsc($x, $y, $idx)
{
return compareColumn($x, $y, $idx, -1, 1);
}
// Your customer comparison function. The order in which you call each
// compareColumn*() is the ultimate order in which your multi-dim
array is sorted.
function compare($x, $y)
{
// total is index 2 of the array
$total = compareColumnDesc($x, $y, 2);
if($total != 0) return $total;
// totalPaid is index 3 of the array
$totalPaid = compareColumnDesc($x, $y, 3);
if($totalPaid != 0) return $totalPaid;
// totalUnpaid is index 4 of the array
$totalUnpaid = compareColumnDesc($x, $y, 4);
if($totalUnpaid != 0) return $totalUnpaid;
// arrays were equal
return 0;
}
$record = array(
array(1, 'marc', 12, 5, 7),
array(5, 'berty', 30, 12, 18),
array(7, 'sarah', 19, 12, 7)
);
// sort your array
usort($record, 'compare');
// print sorted array
echo 'pre';
var_export($record);
echo '/pre';
[/code]
HTH,
John W
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Re: [PHP] sorting array question
hi guys, thanks for the replies! yes Melanie, you were correct the last example (i had an old version of the manual). seemed to do the trick =) Thanks to john as well for the reply. Angelo Melanie Maddix wrote: [snip] So they way I want to sort these rows is by total, totalPaid, totalUnpaid all descending. Output should be: partnerID | partnerName | total | totalPaid | totalUnpaid 5 berty 301218 7 sarah 19127 1 marc 12 57 I have looked at the manual and found uasort and array_multisort, but these don't seem to be appropriate unless Im missing something but the examples found are very vague. If anyone can help that would be great, Thanks in advance Angelo [/snip] Hi Angelo, Take a look at Example 3 under array_multisort, the one that sorts by volume and edition. You first build arrays of the columns you want to sort by, then pass them as an argument to array_multisort, along with your original array. Melanie -- Angelo Zanetti Systems developer *Telephone:* +27 (021) 469 1052 *Mobile:* +27 (0) 72 441 3355 *Fax:*+27 (0) 86 681 5885 * Web:* http://www.zlogic.co.za *E-Mail:* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sorting troubles
On Sat, April 22, 2006 4:49 am, William Stokes wrote: I have a column in DB that contains this kind of data, A20,B16,B17C14,C15,D13,D12 etc. I would like to print this data to a page and sort it ascending by the letter an descending by the number. Can this be done? Like A20 B17 B16 C15 C14 D13 D12 I personally would do it in SQL, since SQL has been specifically fine-tuned for about 4 decades to do this [bleep] fast, while PHP has not: select col from DB order by substring(col, 1, 1), substring(col, 2) You could also consider creating a view in your DB, if your DB supports views. If not, and the dataset is VERY large, and/or your particular database does not allow a function in ORDER BY clauses, I would suggest you add two indexed fields and break that one column up into two. You'd need to add some kind of logic somewhere (triggers in the DB, application logic, whatever) to manage the copying of the data from the column to the other. No matter how you slice it, though, the LAST option I'd use would be to use http://php.net/usort to sort the data from a DB in PHP. Still, it's an option, if your DB is particularly broken, to the point where none of the above apply. I don't think any such DB exists with PHP support, unless maybe via ODBC, but I may as well provide the complete answer, eh? -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sorting troubles
Thanks for your input everyone! The easiest way to do this was ansding this to the SELECT clause: select col from DB order by substring(col, 1, 1) ASC, substring(col, 2) DESC Seems to work fine. -Will Richard Lynch [EMAIL PROTECTED] kirjoitti viestissä:[EMAIL PROTECTED] On Sat, April 22, 2006 4:49 am, William Stokes wrote: I have a column in DB that contains this kind of data, A20,B16,B17C14,C15,D13,D12 etc. I would like to print this data to a page and sort it ascending by the letter an descending by the number. Can this be done? Like A20 B17 B16 C15 C14 D13 D12 I personally would do it in SQL, since SQL has been specifically fine-tuned for about 4 decades to do this [bleep] fast, while PHP has not: select col from DB order by substring(col, 1, 1), substring(col, 2) You could also consider creating a view in your DB, if your DB supports views. If not, and the dataset is VERY large, and/or your particular database does not allow a function in ORDER BY clauses, I would suggest you add two indexed fields and break that one column up into two. You'd need to add some kind of logic somewhere (triggers in the DB, application logic, whatever) to manage the copying of the data from the column to the other. No matter how you slice it, though, the LAST option I'd use would be to use http://php.net/usort to sort the data from a DB in PHP. Still, it's an option, if your DB is particularly broken, to the point where none of the above apply. I don't think any such DB exists with PHP support, unless maybe via ODBC, but I may as well provide the complete answer, eh? -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sorting troubles
On Apr 22, 2006, at 4:49 AM, William Stokes wrote: Hello, Any idea how to sort this? I have a column in DB that contains this kind of data, A20,B16,B17C14,C15,D13,D12 etc. I would like to print this data to a page and sort it ascending by the letter an descending by the number. Can this be done? Like A20 B17 B16 C15 C14 D13 D12 Thanks -Will Maybe I'm missing something, but I don't think that I've seen anyone mention this. Can you not just sort the data before it reaches your php code... meaning, via the db? My example uses MySQL: ? $result = msyql_query(SELECT * FROM your_database ORDER BY ASC, $link); while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) $column[$i++] = $row[your_column]; ... for ($i=0; $i$numOfCols; $i++) echo $column[$i]br/; ? Again, I may have misread what you are asking, but this appears to be a simple solution when pulling from a database. Good luck, ~Philip -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sorting troubles
On Apr 24, 2006, at 9:06 AM, Philip Thompson wrote: On Apr 22, 2006, at 4:49 AM, William Stokes wrote: Hello, Any idea how to sort this? I have a column in DB that contains this kind of data, A20,B16,B17C14,C15,D13,D12 etc. I would like to print this data to a page and sort it ascending by the letter an descending by the number. Can this be done? Like A20 B17 B16 C15 C14 D13 D12 Thanks -Will Maybe I'm missing something, but I don't think that I've seen anyone mention this. Can you not just sort the data before it reaches your php code... meaning, via the db? My example uses MySQL: ? $result = msyql_query(SELECT * FROM your_database ORDER BY ASC, $link); Ooops! ... ORDER BY your_column ASC ... while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) $column[$i++] = $row[your_column]; ... for ($i=0; $i$numOfCols; $i++) echo $column[$i]br/; ? Again, I may have misread what you are asking, but this appears to be a simple solution when pulling from a database. Good luck, ~Philip -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sorting troubles
I have a column in DB that contains this kind of data, A20,B16,B17C14,C15,D13,D12 etc. I would like to print this data to a page and sort it ascending by the letter an descending by the number. Can this be done? Like A20 B17 B16 C15 C14 D13 D12 Depending on how many records you have and how many you want per page, you might be better off doing this in your database query (eg you have d01 - d99 and only want to show 30 per page)... Depending on which db you use, different syntaxes will apply.. so if you need further help send which db and which version. -- Postgresql php tutorials http://www.designmagick.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sorting troubles
William Stokes wrote:
Hello,
Any idea how to sort this?
I have a column in DB that contains this kind of data,
A20,B16,B17C14,C15,D13,D12 etc.
I would like to print this data to a page and sort it ascending by the
letter an descending by the number. Can this be done?
PHP has the usort() function which allows you to sort by another
function. This allows you to very neatly sort by virtually any criteria.
I knocked up a fairly simple function to do the sort that you described.
The format for the comparison function is in the usort() documentation
as well as several examples.
php
function weird_comparison($a, $b) {
# return -1, 0, 1 if $a is less than, equal to or greater than $b
if($a{0} $b{0})
return 1;
elseif($a{0} $b{0})
return -1;
else {
$a_num = substr($a, 1);
$b_num = substr($b, 1);
if($a_num $b_num)
return -1;
elseif($a_num $b_num)
return 1;
else
return 0;
}
}
$arr = explode(',', 'A20,B16,B17,C14,C15,D13,D12');
print_r($arr);
usort($arr, 'weird_comparison');
print_r($arr);
?
David
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Re: [PHP] sorting troubles
See explode, http://www.php.net/explode
$var = 'A20,B16,B17C14,C15,D13,D12';
$array = explode(',',$var);
foreach ($array as $key = $value) {
echo $value .\n;
}
William Stokes wrote:
Hello,
Any idea how to sort this?
I have a column in DB that contains this kind of data,
A20,B16,B17C14,C15,D13,D12 etc.
I would like to print this data to a page and sort it ascending by the
letter an descending by the number. Can this be done? Like
A20
B17
B16
C15
C14
D13
D12
Thanks
-Will
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Re: [PHP] sorting troubles
hmm, should also see http://www.php.net/sort
Peter Hoskin wrote:
See explode, http://www.php.net/explode
$var = 'A20,B16,B17C14,C15,D13,D12';
$array = explode(',',$var);
foreach ($array as $key = $value) {
echo $value .\n;
}
William Stokes wrote:
Hello,
Any idea how to sort this?
I have a column in DB that contains this kind of data,
A20,B16,B17C14,C15,D13,D12 etc.
I would like to print this data to a page and sort it ascending by the
letter an descending by the number. Can this be done? Like
A20
B17
B16
C15
C14
D13
D12
Thanks
-Will
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Re: [PHP] sorting troubles
At 02:49 AM 4/22/2006, William Stokes wrote: I have a column in DB that contains this kind of data, A20,B16,B17C14,C15,D13,D12 etc. I would like to print this data to a page and sort it ascending by the letter an descending by the number. Can this be done? Like A20 B17 B16 C15 C14 D13 D12 Will, I can think of two ways to do this. One way involves splitting each value into its two components so you can sort one ASC the other DESC. (First off, I'd seriously consider storing them in two separate DB fields. If you can do this, your problem is over because you can extract them in a query in just the order you want. If you're sorting them in opposite directions that's a pretty good clue that they're really separate data and should be stored separately.) But you can split them on the fly in PHP. You can run preg_match() on each element of your array with a RegExp something like: /(\D)(\d+)/ (one non-numeric character followed by one or more numeric digits) preg_match(/(\D)(\d+)/, $aData($i), $aMatches) is going to produce an array like: $aMatches = array( [0] = A20 [1] = A [2] = 20 ) Build a workspace array using those three match values, sort the way you want on [1] [2], and extract your result array from [0]. An alternative way to do this, trickier but probably much faster, is to translate the initial letter into a value that's its inverse: $aFrom = array(A,B,C,...Z); $aTo = array(Z,Y,X,...A); $aTemp = str_replace($aFrom, $aTo, $aData); This will translate the letters in all the elements of the data array into their inverse: B16 -- Y16 A20 -- Z20 B17 -- Y17 ... Then just do a reverse sort on $aTemp and you get: Z20 Y17 Y16 Then translate the letters back to their original values and you get: A20 B17 C16 Voila. Paul -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sorting troubles
At 03:43 AM 4/22/2006, I wrote: Then just do a reverse sort on $aTemp and you get: Z20 Y17 Y16 Then translate the letters back to their original values and you get: A20 B17 C16 Oops, I made a typo: that final value should have been B16, not C16. (All the same, not too shabby for four in the morning...) Paul -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sorting dates with php
You COULD sort them if the date was stored backwards, ie. Year/Month/Day On 12/21/05, Jim Moseby [EMAIL PROTECTED] wrote: Have a load of dates in the format DD/MM/YY. Thet are stored as a VARCHAR on a mysql DB. I need a way to sort them into order(most recent first) Using the QUERY $query = SELECT doc_date FROM papers ORDER BY doc_date DESC; this just arranges them by day. e.g 30/12/2005 30/11/2005 22/12/2005 19/12/2005 17/12/2005 12/12/2005 10/12/2005 06/12/2007 06/09/2002 05/12/2005 05/09/2005 Now I have tried to use strtotime() but I find this needs a timezone (GMT) to work and I don't know if the server supports it. Also I find strototime() and mktime() very confusing and a things go wrong of you work in GMT because we also have Brittish Summer Time where the clocks get put back/forward at certain time of the year. Is there a simple function like sort() that could do it?? Hi! Its a real shame your dates aren't stored in a DATE type field instead of VARCHAR, because you can just sort them in your query with order by DATE. If its possible, you would really benefit by converting them and storing them in the proper DATE type field. That being said, I suppose you could explode() them into an array then figure out how to sort them from there. JM -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sorting dates with php
On 12/21/05, Ross [EMAIL PROTECTED] wrote: Hi, Have a load of dates in the format DD/MM/YY. Thet are stored as a VARCHAR on a mysql DB. Couldn't you use cast() to cast the values first? Something like (untested): SELECT CAST(doc_date AS DATE) FROM papers ORDER BY doc_date DESC c -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting users geographically...
Hi Tony, I would think the first step would be to find a web service or dataset to convert a zip code to longitude/latitude. The formula for calculating distances from long/lat is available here: http://www.colorado.edu/geography/gcraft/warmup/aquifer/html/distance.html Cheers, David Grant Tony Di Croce wrote: I'm helping a friend of mine build a matchmaking website, and we have a doozy of a problem to solve: What I need to do is two fold: #1 Collect whatever geographical information I need from each user to enable #2 #2 Be able to run query's to find people NEAR (geographically) another person. Does anyone know of any commercial or free implementations of this? Is it primarily a database problem or is their some way (computationally) to compute the probable proximity of two zip codes? Hopefully someone responds to this with a Pear package that does exactly what I need! :) If that can't happen, then I'd appreciate any options you can think of. td -- Free Linux Technical Articles http://www.linuxtecharticles.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Sorting users geographically...
I'm helping a friend of mine build a matchmaking website, and we have a doozy of a problem to solve: What I need to do is two fold: #1 Collect whatever geographical information I need from each user to enable #2 #2 Be able to run query's to find people NEAR (geographically) another person. Does anyone know of any commercial or free implementations of this? Is it primarily a database problem or is their some way (computationally) to compute the probable proximity of two zip codes? Hopefully someone responds to this with a Pear package that does exactly what I need! :) If that can't happen, then I'd appreciate any options you can think of. http://sniptools.com/latitudeLongitude.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Sorting users geographically...
Does anyone know of any commercial or free implementations of this? Is it primarily a database problem or is their some way (computationally) to compute the probable proximity of two zip codes? There is a class called zipLocator. I think I found it at phpclasses.org. It uses a large zipcode database, which can be downloaded for free (the address is in the class). This will return all zipcodes within a specified distance from the target zipcode (10 mi, 50 mi, etc.). If you can't find it, contact me offline. Regards, SK WebDesigns Internet Consulting E-commerce Solutions Application Development Sandy Keathley Zend Certified Engineer [EMAIL PROTECTED] 972-569-8464 http://www.KeathleyWebs.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting users geographically...
On 21 Nov 2005, at 14:14, Tony Di Croce wrote: Does anyone know of any commercial or free implementations of this? Is it primarily a database problem or is their some way (computationally) to compute the probable proximity of two zip codes? All the suggested packages could be all you need, but also note that MySQL 5 has built-in GIS features which may make searches like these way more efficient should they use them: http://dev.mysql.com/doc/refman/5.0/en/spatial-extensions-in-mysql.html http://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial- relationships-between-geometries.html Marcus -- Marcus Bointon Synchromedia Limited: Putting you in the picture [EMAIL PROTECTED] | http://www.synchromedia.co.uk -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting with french characters
On Thu, June 23, 2005 7:37 am, Mathieu Dumoulin said: STR_REPLACE on all possible accents, i got over a thousand records from the database to parse in a fast way and there are at the very least 60 Odds are REALLY GOOD you can get the database to ORDER BY using your locale/language/charset of choice, and get it MUCH MUCH MUCH faster than ksort. You're should ask How on a mailing list for your database, though. -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] sorting object props
On Fri, June 17, 2005 2:48 pm, D_C said: is there a way to sort the properties of an object by their name, much like sort works on arrays? i am getting back an object from a database query and want to list the resulting items in alpha order by field name... http://php.net/ksort Last time I checked, PHP would still convert an object to an array if you forced it to... If not, there are introspective functions to examine your object and all its properties, and surely you could build the array yourself and then ksort it. -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Sorting Objects in an array by object properties
Hello list,
I have an array which holds some objects. Each object
represent elements from an email header in a given mailbox.
Each object has properties like from, sendtime, subject etc.
I want to sort the order of the objects in the array by their
attribute sendtime in order to get a list of email header
sorted by their arrival time.
Has anyone an idea how to solve this? I tried various of the
array sorting functions but without success.
http://php.net/usort
function compare($h1, $h2)
{
return strcmp($h1-sendtime, $h2-sendtime);
}
usort($array, 'compare');
Jared
--
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Re: [PHP] Sorting table columns dynamically on normalized MySQL tables
On Wed, April 20, 2005 5:53 am, Leif Gregory said: So joining on four tables isn't considered bad practice? No, it's great practice. The only thing to watch for is just how *BIG* will the number of tuples grow? If you can multiply together the number of rows in all four tables and come up with 1,000,000 you're fine. If not, you have to start thinking about how you can get just the ones you want for each query, and do it in such a way the MySQL never has to cope with 1,000,000 rows at once. Actually MySQL is quite happy to do 1,000,000 rows -- It's your hardware that won't like it. :-) So it really depends on what's *IN* the data, rather than the actual number of tables. Be sure you always get your WHERE clauses right. One rule of thumb: Work your way through all tables being joined from left to right: FROM table1, table2, table3, table4, ... For each tableX, make sure that you are relating it back to a previous table, with an INDEXED key field in your WHERE clause with AND between them: WHERE table1.indexA = table2.indexB AND table2.indexC = table3.indexD AND table3.indexE = table4.indexE It doesn't matter on table3 if you have it tied to table2 (as above) or table 1 -- So long as the fields are indexed, and you can trace back from every tableX to table1 *somehow* But you wouldn't want just *this* WHERE table1.indexA = table2.indexB AND table3.indexC = table4.indexD You've got nothing to tie table3 and table4 back to table1, so every single row in the 3/4 combination is going to be listed with every single row with the 1/2 combination, in every possible permutation... Try it with some very small (number of rows) tables just to see what happens! -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting table columns dynamically on normalized MySQL tables [LONG]
Hello Jay,
Tuesday, April 19, 2005, 1:28:25 PM, you wrote:
J Normalization has no effect on sort order where any DB is concerned.
J Sort order is determined in the sort clause in the query. So if you want
J to sort by location and you are using MySQL your ORDER BY clause should
J be location(regardless of joins)
J SELECT foo
J FROM bar
J ORDER BY location
J returns
J course instructor location
J Science Bill Elementary School
J Basket Weaving Dave High School
J Math Dave Middle School
J Biology Jessica Middle School
Maybe I wasn't clear.
SELECT *
FROM Course
ORDER BY locationID ASC
Now the ORDER BY can be any one of five things based on the variable
passed by the hyperlink for the column they clicked on (location,
course, date, category, and instructor
Because locationID is an integer which directly relates to the
Instructors table id field (also an integer), there is no way in heck
that it can sort that any other way than numerically. There is no join
between the Course, Locations, and Instructors tables. All the Course
table knows is that there is an integer in the instructorID,
categoryID, and locationID field. Therefore it gets sorted
numerically, not alphabetically.
As I said, I was trying to keep the example simple. I actually have
the following tables in the DB.
Courses
Instructors
Locations
Categories
Students
Registrations
Supervisors
Courses contains information pertinent to a course.
- id
- name
- courseDate
- courseTime
- ampm (morning or afternoon)
- capacity (number of seats available)
- locationID (corresponding id from the Locations table)
- instructorID (corresponding id from the Instructors table)
- seatsLeft (counter for the number of available seats)
- description (what the course is about)
- categoryID (corresponding id from the Categories table)
Instructors
- id
- firstName
- lastName
- email
- phone
- image
- about
Locations
- id
- name
- seatingCapacity (How many true seats there are in the room)
- address
- directions
Categories
- id
- name
Students
- id
- firstName
- lastName
- email
- phone
- password
- username
- divisionOrFacility
- programArea
- supervisorID
Supervisors
- id
- firstName
- lastName
- email
- phone
Registrations
- id
- courseID
- studentID
- attended
So... For me to list the upcoming courses on the main page, I have the
following column in the table:
Course Name - From Course Table
Open Seats- From Course Table
Category - From Course Table (match id in Categories table)
Date - From Course Table
Time - From Course Table
Location - From Course Table (match id in Locations table)
Instructor- From Course Table (match id in Instructors table)
Category, Location, and Instructor are integers. What I did to get the
names respective to the integer value is that beforehand I built an
array for those three tables then I match the id from the Course Table
for each of the three with their respective array, and then display
the name.
Since the SELECT statement is based on the Course table, and the
Course table contains only integers, it's sorting by the integer value
of the categoryID, instructorID, or locationID in the Course table.
The actual SELECT statement is as follows:
$sqlCourses=SELECT * FROM . $tbl_courses . WHERE courseDate ' .
date(Y-m-d) . ' ORDER BY . $orderBy . ASC;
the $orderBy variable is set via $_GET['orderBy'] which is sent by the
table headers as below:
$tblHeaders = 'tha href=' . $_SERVER['PHP_SELF'] .
'?orderBy=nameCourse/a/ththOpen Seats/ththa href=' .
$_SERVER['PHP_SELF'] . '?orderBy=categoryIdCategory/a/ththa href=' .
$_SERVER['PHP_SELF'] . '?orderBy=courseDateDate/a/ththTime/ththa
href=' . $_SERVER['PHP_SELF'] . '?orderBy=roomIdLocation/a/ththa
href=' . $_SERVER['PHP_SELF'] . '?orderBy=instructorIdInstructor/a/th';
The sorting works just fine, but it's numerical ASC based off the
integer value (instructorID, categoryID, or locationID). It is *not*
alphabetical, which is what the customer wants.
If they sort by Location, the location column should be alphabetical
ASC, if by course name, then alphabetical ASC by the course name.
Is that a bit clearer now?
Sorry that this has degenerated into a MySQL question rather than PHP.
I was originally looking for how people handled it in PHP.
BTW, just for clarity sake on the arrays used to build the lookups to
display the list of courses, I'm doing an include with the following:
?php
//Get instructors --
$sqlInstructors=SELECT * FROM . $tbl_instructors;
$resultInstructors=mysql_query($sqlInstructors) or die('Failed to get
instructors. Please contact ' . $maintainer);
while ($rInstructors=mysql_fetch_assoc($resultInstructors))
{
Re: [PHP] Sorting table columns dynamically on normalized MySQL tables [LONG]
The actual SELECT statement is as follows: $sqlCourses=SELECT * FROM . $tbl_courses . WHERE courseDate ' . date(Y-m-d) . ' ORDER BY . $orderBy . ASC; the $orderBy variable is set via $_GET['orderBy'] which is sent by the table headers as below: I'm curious why you aren't joining the other tables? That will solve all your woes... thnx, Chris -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Sorting table columns dynamically on normalized MySQL tables [LONG]
[snip] SELECT * FROM Course ORDER BY locationID ASC Now the ORDER BY can be any one of five things based on the variable passed by the hyperlink for the column they clicked on (location, course, date, category, and instructor [/snip] If you had a JOIN to the location table you could order by the actual location. Here is an example... SELECT c.courseName, l.locationName FROM Course c, Location l WHERE c.locationID = l.locationID ORDER BY l.locationName [snip] Sorry that this has degenerated into a MySQL question rather than PHP. I was originally looking for how people handled it in PHP. [/snip] Actually it didn't degenerate, it was a SQL question all along. Unless you had a desire to build sortable arrays in PHP this type of sort should always be done on the SQL side because it would be much more efficient. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Sorting table columns dynamically on normalized MySQL tables [LONG]
[snip] Sorry that this has degenerated into a MySQL question rather than PHP. I was originally looking for how people handled it in PHP. --- Actually it didn't degenerate, it was a SQL question all along. Unless you had a desire to build sortable arrays in PHP this type of sort should always be done on the SQL side because it would be much more efficient. [/snip] I also should have said that it the joins that allow you to maintain normalized tables, for without joins you would be stuck with doing the magic in the programming language. Since most DB engines are optimized for handling joins leave that efficiency on that side of the equation. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting table columns dynamically on normalized MySQL tables
Hello Kim, Tuesday, April 19, 2005, 6:44:58 PM, you wrote: K If you are still looking for tips and want to get K complicated/fancy, I have seen columns used called sort_order more K than a few times. This should not be too hard to maintain for K things like a few buildings, etc., where the lookup table does not K change much over time. You would then have another option for your K oder by clause. I understand what you mean, but I'm still in the same boat. There is no join between the four tables (mainly because I didn't think you were supposed to do joins on four tables. I've written a couple other replies which I think more clearly state where my problem is so I won't retype them here. Thanks though. -- Leif (TB lists moderator and fellow end user). Using The Bat! 3.0.9.17 Return under Windows XP 5.1 Build 2600 Service Pack 2 on a Pentium 4 2GHz with 512MB -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting table columns dynamically on normalized MySQL tables
Hello Richard, Tuesday, April 19, 2005, 9:12:14 PM, you wrote: R Just build a JOIN query and do one query. Doing a join on four tables is ok? (serious question, not being facetious). R No, it is *NOT* sorting on the ID number. I can definitely say it is sorting on locationID, categoryID, or instructorID. It's not alphabetical. When I view the listing after a sort on say locationID, it's not alphabetical but ordered by which class has the lowest numerical value in the locationID field and then ASC from there. R By definition, in SQL, if you don't specify a sort order (or in R this case a second order) then the SQL engine can and will output R the records in any order it feels like. Really? I didn't know that. I thought it started at record 0 and then output them in the order they appeared in the table data view (using something like PHPMyAdmin.) R In that case of MySQL and ISAM tables, that *HAPPENS* to be the ID R order, because the under-lying SQL engine happens to find it R convenient to have them in that order. Ahhh. Ok, there we go. R If you *DELETE* an ID number, then put another one in, but force it R to be the same ID number you'll probably see the records come out R in a different order. It's usually a really Bad Idea to do that R (forcing an ID to be re-used) but for the purposes of R learning/demonstration you can do it. I'll give it a shot sometime to see. It'll be interesting to find out. R At any rate, MySQL is *NOT* sorting by ID number. It's not sorting R *AT* *ALL* except for what you told it to sort. It just spews out R the records in any old order at all after location is done -- R Which happens to be ID order, but that's more like coincidence than R plan [*]. Maybe I confused you with the ID nomenclature. I mean to say it's sorting by locationID, categoryID, instructorID (whichever column I clicked on), and since those are integer values they aren't sorted alphabetically). That's not what they want obviously. R Why not? R What *DO* they want, then? If they sort by location, they want the course records to show up in alphabetical order based on location. Right now it does sort by location, but it's not alphabetical because the Course.locationID, Course.instructorID, and Course.categoryID are integers which relate to three other respective tables. There is no join, and I didn't think you were supposed to do a join on four tables. R Do you want, perhaps, to have a DEFAULT sort order, which kicks in R after their chosen ordering? By default it sorts by Course date. R Perhaps you could do (here's your magic bullet): R ?php R $default_sort_order = course, instructor, location; R . R . R . R $query .= ORDER BY $_GET[order_by], $default_sort_order ; ? I'm kinda doing that already as: if (isset($_GET['orderBy'])) $orderBy = $_GET['orderBy']; else $orderBy = 'courseDate'; R Then, oddly enough, by location again, but that's kinda R irrelevant. It won't *hurt* anything [**], mind you, it's just R kinda silly, since you have already sorted by location in the very R first place. Got it. R [**] Technically, it's a little inefficient to have that extra R bogus location in there at the end, but you're probably not R sorting enough rows for it to make any measurable difference in R your results... And MySQL might even be smart enough to optimize it R out anyway. True enough. I'm guessing they'll be maybe 30 to 50 records at any one time. R You did the right thing. :-) grin Tell me that again once I get the sorting working right! grin R You just needed to go farther down the road you are on, instead of R stopping partway. Only stopped because I got stuck... :-) Thanks. -- Leif (TB lists moderator and fellow end user). Using The Bat! 3.0.9.17 Return under Windows XP 5.1 Build 2600 Service Pack 2 on a Pentium 4 2GHz with 512MB -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting table columns dynamically on normalized MySQL tables
Hello Chris, Tuesday, April 19, 2005, 1:23:53 PM, you wrote: C Firstly, what DB are you using? MySQL. C SELECT C course.name, C location.name, C instructor.name C FROM C course C INNER JOIN location ON location.id = course.locationID C INNER JOIN instructor ON instructor.id = course.instroctorID C ORDER BY instructor.name C (or location.name or course.name). C It should be as simple as that... So joining on four tables isn't considered bad practice? Technically it's going to be five tables because the whole HTML table layout changes to include enroll and disenroll buttons once they log in and based on if they are enrolled or not in a particular course which comes from the registrations table, which is simply their the id from the Students table and the id from the Course table. Thanks. -- Leif (TB lists moderator and fellow end user). Using The Bat! 3.0.9.17 Return under Windows XP 5.1 Build 2600 Service Pack 2 on a Pentium 4 2GHz with 512MB -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting table columns dynamically on normalized MySQL tables
R Just build a JOIN query and do one query. Doing a join on four tables is ok? (serious question, not being facetious). Yes. I've built a query before (for reporting purposes) that join 15 tables... Just make sure the tables are indexed properly. thnx, Chris -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Sorting table columns dynamically on normalized MySQL tables
[snip] Doing a join on four tables is ok? (serious question, not being facetious). [/snip] Yes, it is OK. Make sure that you have the tables properly indexed and you'll have no problems. [snip] R By definition, in SQL, if you don't specify a sort order (or in R this case a second order) then the SQL engine can and will output R the records in any order it feels like. Really? I didn't know that. I thought it started at record 0 and then output them in the order they appeared in the table data view (using something like PHPMyAdmin.) [/snip] PHPMyAdmin uses an ORDER BY clause and it is initially on the primary key index for any given table. Then PHPMyAdmin uses relevant column data for the sort. SQL CAN and DOES spit out the records any way it wants when no sort is specified. You dod not typically see it because of query caching. (Ever notice that a second issue of the same query you just made is much faster? Query caching.) [snip] R If you *DELETE* an ID number, then put another one in, but force it R to be the same ID number you'll probably see the records come out R in a different order. It's usually a really Bad Idea to do that R (forcing an ID to be re-used) but for the purposes of R learning/demonstration you can do it. I'll give it a shot sometime to see. It'll be interesting to find out. [/snip] +1 on the bad idea for primary key re-use. [snip] If they sort by location, they want the course records to show up in alphabetical order based on location. Right now it does sort by location, but it's not alphabetical because the Course.locationID, Course.instructorID, and Course.categoryID are integers which relate to three other respective tables. There is no join, and I didn't think you were supposed to do a join on four tables. [/snip] Furthering our discussion of the ORDER BY clause...you can put more than one sort criteria there... ORDER BY l.locationName, c.courseName -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting table columns dynamically on normalized MySQL tables
I can do that, but is there a better way? How do you all handle dynamic sorting of normalized DBs? Firstly, what DB are you using? Secondly, just select and sort on the columns. An example query would be: SELECT course.name, location.name, instructor.name FROM course INNER JOIN location ON location.id = course.locationID INNER JOIN instructor ON instructor.id = course.instroctorID ORDER BY instructor.name (or location.name or course.name). It should be as simple as that... thnx, Chris -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Sorting table columns dynamically on normalized MySQL tables
[snip] I can do that, but is there a better way? How do you all handle dynamic sorting of normalized DBs? [/snip] Normalization has no effect on sort order where any DB is concerned. Sort order is determined in the sort clause in the query. So if you want to sort by location and you are using MySQL your ORDER BY clause should be location(regardless of joins) SELECT foo FROM bar ORDER BY location returns course instructor location Science Bill Elementary School Basket Weaving Dave High School Math Dave Middle School Biology Jessica Middle School The results with course as the sort qualifier course instructor location Basket Weaving Dave High School Biology Jessica Middle School Math Dave Middle School Science Bill Elementary School You have over-compicated a simple issue -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Sorting table columns dynamically on normalized MySQL tables
Greetings, If you are still looking for tips and want to get complicated/fancy, I have seen columns used called sort_order more than a few times. This should not be too hard to maintain for things like a few buildings, etc., where the lookup table does not change much over time. You would then have another option for your oder by clause. cheers, KB On 4/19/05, Jay Blanchard [EMAIL PROTECTED] wrote: [snip] I can do that, but is there a better way? How do you all handle dynamic sorting of normalized DBs? [/snip] Normalization has no effect on sort order where any DB is concerned. Sort order is determined in the sort clause in the query. So if you want to sort by location and you are using MySQL your ORDER BY clause should be location(regardless of joins) SELECT foo FROM bar ORDER BY location returns course instructor location Science Bill Elementary School Basket Weaving Dave High School Math Dave Middle School Biology Jessica Middle School The results with course as the sort qualifier course instructor location Basket Weaving Dave High School Biology Jessica Middle School Math Dave Middle School Science Bill Elementary School You have over-compicated a simple issue -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
