RE: [PHP] populate form input option dropdown box from existing data
-Original Message-
From: PJ [mailto:af.gour...@videotron.ca]
Sent: 15 June 2009 23:10
To: php-general@lists.php.net
Subject: [PHP] populate form input option dropdown box from existing data
I am having difficulties figuring out how enter retrieved data into a
dropdown box for editing. Here's a snippet:
...snip
select name=categoriesIN[] multiple size=8
option value=1Civilization/option
option value=2Monuments, Temples amp; Tombs/option
option value=3Pharaohs and Queens/option... snip
As I understand it, I need to put an array ( $categoriesIN[] ) somewhere
in the above code... or do I need to insert a series of value selected
fields for the values?
The closest thing to what I need, seems to be in this post:
http://www.hpfreaks.com/forums/index.php?topic=165215
But it doesn't appear too inviting... not sure if they ever got it to
work...
Hi,
Something like this should work for you
?php
// Set up initial values
// This could be hard-coded or brought in from DB or other source
$categoriesIN_options = array(1 = 'Civilzation',
2 = 'Monuments, Temples amp;
Tombs',
3 = 'Pharaohs and Queens',
);
// Create a holder for values posted if you want
// to repopulate the form on submission
$selected_clean = array();
// Check for passed values and validate
if (array_key_exists('categoriesIN',$_REQUEST)) {
// Prevents errors with the foreach
$passed_categoriesIN = (array)$_POST['categoriesIN'];
foreach ($passed_categoriesIN as $options_key) {
// If the value isn't in our pre-defined array, handle the error
if (!array_key_exists($options_key,$categoriesIN_options)) {
// Handle error
continue;
}
$selected_clean[] = $options_key;
}
}
?
[snip]
select name='categoriesIN' multiple size='8'
?php // Loop over the options set above
foreach ($categoriesIN_options as $key = $value) {
echo option value='{$key}';
// Repopulate with selected
if (in_array($key,$selected_clean)) {
echo selected='selected';
}
echo {$value}/option\n;
}
?
/select
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RE: [PHP] difference between two times? Date_diff and DateTime::diff
Hi Matthew,
A quick note on the DateTime::diff() method - it's only available as from
PHP 5.3, which is currently in release candidate stage, meaning unless you
have your own server running PHP, it won't be available to use (hopefully -
I would be sceptical of any webhost which rolls out RCs on production
servers).
If you need to know what version of PHP you're running, use:
phpversion() or phpinfo()
-Original Message-
From: Matthew Croud [mailto:m...@obviousdigital.com]
Sent: 16 June 2009 12:42
To: Tom Chubb
Cc: PHP General list
Subject: Re: [PHP] difference between two times? Date_diff and
DateTime::diff
Hi Tom,
Thanks for the reply, I believe I have a fair understanding of
functions, and I have followed the example on the PHP manual page (
http://uk3.php.net/manual/en/function.date-diff.php
), ideally I want to know how to use the class DateTime::diff, how
can I use the DateTime::diff to get the difference between two times/
dates ? I suppose then I'm after the syntax
would it be like this for example:
$DIfferenceInTime = DateTime::diff(10:00,12:32);
Thanks again for helping me out.
On 16 Jun 2009, at 12:33, Tom Chubb wrote:
Matt,
Do you understand how to use functions?
A function is defined like this:
function () {
//code goes here
}
You can pass arguments to be used in a function like this:
function($arg1, $arg2) {
//code goes here
}
In the first example on the following page:
http://uk3.php.net/manual/en/function.date-diff.php
To call the function you need to provide two arguments: $dtTime1
$dtTime2
To use in a script, you need to first define the function, as per
the example:
?php
function GetDeltaTime($dtTime1, $dtTime2)
{
$nUXDate1 = strtotime($dtTime1-format(Y-m-d H:i:s));
$nUXDate2 = strtotime($dtTime2-format(Y-m-d H:i:s));
$nUXDelta = $nUXDate1 - $nUXDate2;
$strDeltaTime = . $nUXDelta/60/60; // sec - hour
$nPos = strpos($strDeltaTime, .);
if (nPos !== false)
$strDeltaTime = substr($strDeltaTime, 0, $nPos + 3);
return $strDeltaTime;
}
?
Then you need to call the function like this:
?php
GetDeltaTime(time1-goes-here, time2-goes-here)
?
And it should spit out the difference.
Code is untested and if you didn't follow that I suggest you read up
on functions: http://www.w3schools.com/php/php_functions.asp
Hope this helps - I'm probably in a similar situation to you and
have been dabbling with PHP for a few years just as a hobby but
thought I'd try and help out.
You'll learn a lot from reading this list as well.
Cheers and good luck,
Tom
2009/6/16 Matthew Croud m...@obviousdigital.com
Hello,
My journey of learning PHP is going well, so i've decided to make a
small program which works out the difference between two times and
records the data in a text file.
I've searched the PHP manual for functions which can help me out,
and I discovered the function Date_diff (
http://uk3.php.net/manual/en/function.date-diff.php
)and the class DateTime::diff (
http://uk3.php.net/manual/en/datetime.diff.php
)
My question is, how on earth do I use these functions ? I really
don't understand the manual documentation.
I've just moved onto the subject of classes and so I'm fairly new to
the concept, although I am following it well.
If someone could explain to me how to use ether of these ( Date_diff
and DateTime::diff ) I would be VERY grateful.
Thank you so much!
Matt
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Matthew Croud
Studio
Obvious Print Solutions Limited
Unit 3 Abbeygate Court
Stockett Lane
Maidstone
Kent
ME15 0PP
T | 0845 094 9704
F | 0845 094 9705
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RE: [PHP] populate form input option dropdown box from existing data
Yeah, I used to write that way but found I and others in the team saved a
lot more time troubleshooting and extending the code when returning 6 months
later if it was more verbose. Horses for courses, I guess.
Also, the selected attribute should be selected='selected' to validate
correctly as xhtml. By the same token, looking back at my example, I notice
the multiple attribute of the select should be multiple='multiple' -
apologies for missing that the first time =o)
-Original Message-
From: jenai tomaka [mailto:gargari...@hotmail.com]
Sent: 16 June 2009 15:56
To: m...@dajve.co.uk; af.gour...@videotron.ca; php-general@lists.php.net
Subject: RE: [PHP] populate form input option dropdown box from existing
data
You can try like this,
$row = stored data;
and write the options like this
option value=id (id == $row ? selected : ) /option
Yuri Yarlei.
From: m...@dajve.co.uk
To: af.gour...@videotron.ca; php-general@lists.php.net
Date: Tue, 16 Jun 2009 09:33:49 +0100
Subject: RE: [PHP] populate form input option dropdown box from existing
data
-Original Message-
From: PJ [mailto:af.gour...@videotron.ca]
Sent: 15 June 2009 23:10
To: php-general@lists.php.net
Subject: [PHP] populate form input option dropdown box from existing
data
I am having difficulties figuring out how enter retrieved data into a
dropdown box for editing. Here's a snippet:
...snip
select name=categoriesIN[] multiple size=8
option value=1Civilization/option
option value=2Monuments, Temples amp; Tombs/option
option value=3Pharaohs and Queens/option... snip
As I understand it, I need to put an array ( $categoriesIN[] )
somewhere
in the above code... or do I need to insert a series of value
selected
fields for the values?
The closest thing to what I need, seems to be in this post:
http://www.hpfreaks.com/forums/index.php?topic=165215
But it doesn't appear too inviting... not sure if they ever got it to
work...
Hi,
Something like this should work for you
?php
// Set up initial values
// This could be hard-coded or brought in from DB or other source
$categoriesIN_options = array(1 = 'Civilzation',
2 = 'Monuments, Temples amp;
Tombs',
3 = 'Pharaohs and Queens',
);
// Create a holder for values posted if you want
// to repopulate the form on submission
$selected_clean = array();
// Check for passed values and validate
if (array_key_exists('categoriesIN',$_REQUEST)) {
// Prevents errors with the foreach
$passed_categoriesIN = (array)$_POST['categoriesIN'];
foreach ($passed_categoriesIN as $options_key) {
// If the value isn't in our pre-defined array, handle the error
if (!array_key_exists($options_key,$categoriesIN_options)) {
// Handle error
continue;
}
$selected_clean[] = $options_key;
}
}
?
[snip]
select name='categoriesIN' multiple size='8'
?php // Loop over the options set above
foreach ($categoriesIN_options as $key = $value) {
echo option value='{$key}';
// Repopulate with selected
if (in_array($key,$selected_clean)) {
echo selected='selected';
}
echo {$value}/option\n;
}
?
/select
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RE: [PHP] difference between two times? Date_diff and DateTime::diff
Also, if you're returning data from MySQL, there are a number of operations
you can perform before it reaches your script:
http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html
From: Tom Chubb [mailto:tomch...@gmail.com]
Sent: 16 June 2009 15:55
To: Matthew Croud
Cc: Dajve Green; PHP General list
Subject: Re: [PHP] difference between two times? Date_diff and
DateTime::diff
The first example here may help:
http://us3.php.net/manual/en/function.time.php
2009/6/16 Matthew Croud m...@obviousdigital.com
Hi Dajve and Tom,
Thanks again, I totally didn't realise that this function is yet to be
implemented in the mainstream PHP,
So is there no function that exists in vanilla PHP that can take two
dates/times and supply the difference ?
If there isn't I do apologise, i've been talking to my friend who does
ASP.net and he said he was sure there is for PHP.
On 16 Jun 2009, at 13:11, Dajve Green wrote:
Hi Matthew,
A quick note on the DateTime::diff() method - it's only available as from
PHP 5.3, which is currently in release candidate stage, meaning unless you
have your own server running PHP, it won't be available to use (hopefully -
I would be sceptical of any webhost which rolls out RCs on production
servers).
If you need to know what version of PHP you're running, use:
phpversion() or phpinfo()
-Original Message-
From: Matthew Croud [mailto:m...@obviousdigital.com]
Sent: 16 June 2009 12:42
To: Tom Chubb
Cc: PHP General list
Subject: Re: [PHP] difference between two times? Date_diff and
DateTime::diff
Hi Tom,
Thanks for the reply, I believe I have a fair understanding of
functions, and I have followed the example on the PHP manual page (
http://uk3.php.net/manual/en/function.date-diff.php
), ideally I want to know how to use the class DateTime::diff, how
can I use the DateTime::diff to get the difference between two times/
dates ? I suppose then I'm after the syntax
would it be like this for example:
$DIfferenceInTime = DateTime::diff(10:00,12:32);
Thanks again for helping me out.
On 16 Jun 2009, at 12:33, Tom Chubb wrote:
Matt,
Do you understand how to use functions?
A function is defined like this:
function () {
//code goes here
}
You can pass arguments to be used in a function like this:
function($arg1, $arg2) {
//code goes here
}
In the first example on the following page:
http://uk3.php.net/manual/en/function.date-diff.php
To call the function you need to provide two arguments: $dtTime1
$dtTime2
To use in a script, you need to first define the function, as per
the example:
?php
function GetDeltaTime($dtTime1, $dtTime2)
{
$nUXDate1 = strtotime($dtTime1-format(Y-m-d H:i:s));
$nUXDate2 = strtotime($dtTime2-format(Y-m-d H:i:s));
$nUXDelta = $nUXDate1 - $nUXDate2;
$strDeltaTime = . $nUXDelta/60/60; // sec - hour
$nPos = strpos($strDeltaTime, .);
if (nPos !== false)
$strDeltaTime = substr($strDeltaTime, 0, $nPos + 3);
return $strDeltaTime;
}
?
Then you need to call the function like this:
?php
GetDeltaTime(time1-goes-here, time2-goes-here)
?
And it should spit out the difference.
Code is untested and if you didn't follow that I suggest you read up
on functions: http://www.w3schools.com/php/php_functions.asp
Hope this helps - I'm probably in a similar situation to you and
have been dabbling with PHP for a few years just as a hobby but
thought I'd try and help out.
You'll learn a lot from reading this list as well.
Cheers and good luck,
Tom
2009/6/16 Matthew Croud m...@obviousdigital.com
Hello,
My journey of learning PHP is going well, so i've decided to make a
small program which works out the difference between two times and
records the data in a text file.
I've searched the PHP manual for functions which can help me out,
and I discovered the function Date_diff (
http://uk3.php.net/manual/en/function.date-diff.php
)and the class DateTime::diff (
http://uk3.php.net/manual/en/datetime.diff.php
)
My question is, how on earth do I use these functions ? I really
don't understand the manual documentation.
I've just moved onto the subject of classes and so I'm fairly new to
the concept, although I am following it well.
If someone could explain to me how to use ether of these ( Date_diff
and DateTime::diff ) I would be VERY grateful.
Thank you so much!
Matt
--
PHP General Mailing List (http://www.php.net/)
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Matthew Croud
Studio
Obvious Print Solutions Limited
Unit 3 Abbeygate Court
Stockett Lane
Maidstone
Kent
ME15 0PP
T | 0845 094 9704
F | 0845 094 9705
www.obviousprint.com
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Matthew Croud
Studio
Obvious Print Solutions Limited
Unit 3 Abbeygate Court
Stockett Lane
Maidstone
Kent
ME15 0PP
T | 0845 094 9704
F | 0845 094 9705
www.obviousprint.com
--
Tom Chubb
t...@tomchubb.com | tomch
RE: [PHP] populate form input option dropdown box from existing data
A *multiple* select control, as in Phil's initial request will return an array, however. -Original Message- From: tedd [mailto:tedd.sperl...@gmail.com] Sent: 16 June 2009 15:58 To: PJ; php-general@lists.php.net Subject: Re: [PHP] populate form input option dropdown box from existing data At 6:09 PM -0400 6/15/09, PJ wrote: I am having difficulties figuring out how enter retrieved data into a dropdown box for editing. Here's a snippet: ...snip select name=categoriesIN[] multiple size=8 option value=1Civilization/option option value=2Monuments, Temples amp; Tombs/option option value=3Pharaohs and Queens/option... snip As I understand it, I need to put an array ( $categoriesIN[] ) somewhere in the above code... or do I need to insert a series of value selected fields for the values? The closest thing to what I need, seems to be in this post: http://www.hpfreaks.com/forums/index.php?topic=165215 But it doesn't appear too inviting... not sure if they ever got it to work... Think about it. A Select control returns *one* value and not an array. As such you don't need to provide an array to collect a single value. Here's the solution: HTML select name=categories option value=1Civilization/option option value=2Monuments, Temples amp; Tombs/option option value=3Pharaohs and Queens/option /select PHP $category = $_POST['categories']; The variable $category will contain 1, 2, or 3 after a post form submit. Try it. The reference/link you cite above is for a dynamic select control that incorporates javascript to populate the second select control. It's not a simple select. If you are looking to understand what basic html does, try this: http://www.htmlcodetutorial.com/ I often use this site to refresh my failing memory about html stuff. 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 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] populate form input option dropdown box from existingdata
Ack, yes - my bad. Missed the select name square brackets when I sent my
example.
And yeah, the only real difference between a multiple select and checkbox is
which works best with the UI (and, more often than not, how confused the
concept of multiple selects makes your end-user)
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-Original Message-
From: tedd [mailto:tedd.sperl...@gmail.com]
Sent: 16 June 2009 19:05
To: php-general@lists.php.net
Subject: Re: [PHP] populate form input option dropdown box from
existingdata
At 10:42 AM -0500 6/16/09, Shawn McKenzie wrote:
He has a multiple select, so the select has to be an array or you just
get one value even if more than one was selected (you just get the last
one).
Okay, it's not that much different than using check-boxes -- here's
the solution for that:
http://www.webbytedd.com/bbb/check-box-form/index.php
and here's the select solution:
http://www.webbytedd.com/bbb/select-box-form/index.php
The point is to use name=option[] (i.e., name the array) and allow
the browser to populate the POST array. Then on the php side of
things, simply pull out the data from the POST array via the array's
name.
You can see how this is done via the above links.
Cheers,
tedd
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RE: [PHP] Re: Form handling
-Original Message-
From: Manuel Lemos [mailto:mle...@acm.org]
Sent: 11 June 2009 07:21
To: Eddie Drapkin
Cc: PHP General Mailing List
Subject: [PHP] Re: Form handling
Hello,
on 06/10/2009 03:10 PM Eddie Drapkin said the following:
I've been charged with writing a class that handles forms, once they've
been
POSTed to. The idea of the class is to handle the most common use-cases
of
POST forms, and any special functionality can be handled with a child
class
at a later date, but for our uses, we're going to have mostly pretty
typical
POST forms. Follows is the list of cases I've determined that are the
most
common, can anyone think of any that are omitted or that are never going
to
be used?
class form_handler {
public /* bool */ function setRequiredFields(array $fields); //takes
a
simple array that corresponds to a $_POST key, verifying that there is
data
on required fields but not for optional fields, returns true or false on
error
public /* bool */ function setRequiredFieldTypes(array $fieldTypes);
//array of field names = type a la ('username' = array(regex,
'/a-zA-Z0-9\-_/'))
//or 'phone_number' = (array('int', 'min_len' = 7,
'max_len' = 10)) etc, the exact spec is obviously nowhere near done but
will probably just wrap a lot of filter_ functions, returns true or
false on
error
public /* string */ function validateAndCaptureError(); //returns
error
or empty string
public /* void */ function validateAndForwardTo($page); //forwards
to
page on error, or not
}
each of the globule setters will have a corresponding appendRequired...
method, so as not to require handling enormous data structures for
conditional form building.
♦
As you can see, the class looks pretty barren, but I can't think of any
more
functionality than would be required, although I am kickign the idea
around
of having very specific validation type methods ie.
form_handler::requireInt($field, array $options) or
form_handler::requireRegex($field, $regex), etc.
Thoughts?
You may want consider not reinventing the wheel.
I use this popular forms generation and validation class since about 10
years now. It can deal with pretty much all you need now and probably
later.
http://www.phpclasses.org/formsgeneration
Here are some live examples of the class and its plug-ins.
http://www.meta-language.net/forms-examples.html
--
Regards,
Manuel Lemos
Whilst Manuel's Forms Generation class / Zend Form et al are certainly quick
and easy to integrate, if this is an in-house project, I don't see a problem
with rolling your own Forms class designed to simply automate some of the
common functionality your developers use. In a lot of cases, out-of-the-box
classes come with bloat while being all things to all men, which is not a bad
thing, per se, but needs to be weighed up when selecting a methodology.
To answer your original question, though, our in-house framework has a base
Form class, which is extended through child classes, as well as a base input
class, which is extended with child classes such as TextInput, SelectInput etc.
This allows each input to have its individual validate() methods, as well as
creating a wrapper Form::validate() method which loops through the
Input::validate() methods.
Example
$Form = new Form;
$Form-fields['text'] = new TextInput;
$Form-fields['select'] = new SelectInput;
$Form-fields['select']-options= array('foo' = 'bar', 'wom' = 'bat');
With regard your setRequiredFields(), we use an Input::$mandatory property,
which the Input::validate() method checks.
The setRequiredFieldTypes() is dealt with by the actual File class.
I would certainly separate out the required validation as mentioned with
requireInt/Regex methods, which would allow combining of required conditions.
We use a $validation bitwise property in the Input class combined with class
constants, as well as minlength / maxlength properties for text / password
fields.
Other things to consider
- Some method of storing user messages during validation which can be output
later.
- Creating an output method for the fields. Repopulating the fields with
submitted values, using CSS to highlight missing or invalid fields or creating
custom fields (such as a date input with a calendar / made up of Y/M/D select
inputs) can lead to a mess if you are hardcoding the output.
For example:
$Form-fields['text']-add_css_class('missing_mandatory');
$Form-fields['text']-set_value('Foo');
$Form-fields['text']-output();
Something further to consider would be to have a $value property and use
__set() overloading
(http://us3.php.net/manual/en/language.oop5.overloading.php) to validate
Eg
$Form-fields['select']-value = 'foo'; // Sets value to foo
$Form-fields['select']-value = 'No such option'; // Does not set
- A method / property to check whether the form has been submitted.
If you
