Re: [PHP] Control Structure problem
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] says...
yeah, i really like using cases they work well and especially if you want to
do something different for different values, i forgot about that, its a good
way to do it,
does php have case else? cuz that is a really handy thing in VB that people
often forget...
You mean 'default'
switch ($var) {
case 'TEST-1': case 'TEST-2': case 'TEST-2':
do_something();
break; // to stop falling through to next option
default: // any other case not above
do_other_thing();
break; //Not really needed as is last statement but good practice
}
And default can appear anywhere in the statement, not just as last item.
Cheers
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RE: [PHP] Control Structure problem
This doesnt work as expected.
if ( $var === TEST ONE || TEST TWO || TEST THREE) {
do something;
}
It returns true on all strings. Ive tried using the or operator
and the == but these fail as well. Any Ideas?
It behaves exactly as expected. Try checking the manual section on control
structures, I believe it explains that the syntax you are using is invalid.
What you are saying is if ( $var === (TEST ONE || TEST TWO || TEST
THREE)) {
(TEST ONE || TEST TWO || TEST THREE) is always going to evaluate as
true. I think what you want is
if ( $var === TEST ONE || $var === TEST TWO || $var === TEST THREE)
{
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Re: [PHP] Control Structure problem
try
if ( $var == TEST ONE || $var == TEST TWO || $var == TEST THREE) {
do something;
}
luke
- Original Message -
From: Dan J. Rychlik [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, September 17, 2003 9:53 AM
Subject: [PHP] Control Structure problem
This doesnt work as expected.
if ( $var === TEST ONE || TEST TWO || TEST THREE) {
do something;
}
It returns true on all strings. Ive tried using the or operator and the ==
but these fail as well. Any Ideas?
-Dan
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Re: [PHP] Control Structure problem
Thank you guys. I truly know the level of expertise on this mailing list,
and I know that it proves invaluable.
Thank you again.
-Dan
- Original Message -
From: Luke Skywalker [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, September 16, 2003 7:01 PM
Subject: Re: [PHP] Control Structure problem
try
if ( $var == TEST ONE || $var == TEST TWO || $var == TEST THREE) {
do something;
}
luke
- Original Message -
From: Dan J. Rychlik [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, September 17, 2003 9:53 AM
Subject: [PHP] Control Structure problem
This doesnt work as expected.
if ( $var === TEST ONE || TEST TWO || TEST THREE) {
do something;
}
It returns true on all strings. Ive tried using the or operator and the
==
but these fail as well. Any Ideas?
-Dan
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[PHP] Control Structure problem
This doesnt work as expected.
if ( $var === TEST ONE || TEST TWO || TEST THREE) {
do something;
}
It returns true on all strings. Ive tried using the or operator and the == but these
fail as well. Any Ideas?
-Dan
Re: [PHP] Control Structure problem
I think speaking for everyone its great to be able to help, we all started
somwhere :) i remember getting stuck on the same problem in visual basic
ages ago
Luke
- Original Message -
From: Dan J. Rychlik [EMAIL PROTECTED]
To: Luke Skywalker [EMAIL PROTECTED];
[EMAIL PROTECTED]
Sent: Wednesday, September 17, 2003 10:12 AM
Subject: Re: [PHP] Control Structure problem
Thank you guys. I truly know the level of expertise on this mailing list,
and I know that it proves invaluable.
Thank you again.
-Dan
- Original Message -
From: Luke Skywalker [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, September 16, 2003 7:01 PM
Subject: Re: [PHP] Control Structure problem
try
if ( $var == TEST ONE || $var == TEST TWO || $var == TEST THREE) {
do something;
}
luke
- Original Message -
From: Dan J. Rychlik [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, September 17, 2003 9:53 AM
Subject: [PHP] Control Structure problem
This doesnt work as expected.
if ( $var === TEST ONE || TEST TWO || TEST THREE) {
do something;
}
It returns true on all strings. Ive tried using the or operator and the
==
but these fail as well. Any Ideas?
-Dan
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RE: [PHP] Control Structure problem
Dan J. Rychlik mailto:[EMAIL PROTECTED] on Tuesday, September 16, 2003 5:12 PM said: Thank you guys. I truly know the level of expertise on this mailing list, and I know that it proves invaluable. lovingjab If by I truly know the level of expertise on this mailing list you meant I truly don't know the basics of PHP syntax, then yeah, you'd be right. ;) !! /lovingjab :) Chris. p.s. Or maybe it's me that's doesn't know the basics... ?? p.p.s. I totally think that the syntax you presented is logical and should be available. It makes much more sense to me to do it the way you did, but alas... -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Control Structure problem
yeah, it does make more sense to do it that way for some things, but when
you get ands, and ors, it gets complicated
eg.
if ($a == foo $b == bar || something){
//do something
}
does that mean $a can either = foo or something or $b = bar or
something?
and thats just a simple example :) but i know it would be really nice in
simple logical expressions
Luke
- Original Message -
From: Chris W. Parker [EMAIL PROTECTED]
To: Dan J. Rychlik [EMAIL PROTECTED]; Luke Skywalker
[EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Wednesday, September 17, 2003 10:18 AM
Subject: RE: [PHP] Control Structure problem
Dan J. Rychlik mailto:[EMAIL PROTECTED]
on Tuesday, September 16, 2003 5:12 PM said:
Thank you guys. I truly know the level of expertise on this mailing
list, and I know that it proves invaluable.
lovingjab
If by I truly know the level of expertise on this mailing list you
meant I truly don't know the basics of PHP syntax, then yeah, you'd be
right. ;) !!
/lovingjab
:)
Chris.
p.s. Or maybe it's me that's doesn't know the basics... ??
p.p.s. I totally think that the syntax you presented is logical and
should be available. It makes much more sense to me to do it the way you
did, but alas...
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Re: [PHP] Control Structure problem
* Thus wrote Chris W. Parker ([EMAIL PROTECTED]):
Dan J. Rychlik mailto:[EMAIL PROTECTED]
on Tuesday, September 16, 2003 5:12 PM said:
Thank you guys. I truly know the level of expertise on this mailing
list, and I know that it proves invaluable.
p.p.s. I totally think that the syntax you presented is logical and
should be available. It makes much more sense to me to do it the way you
did, but alas...
Well technically you can do it like:
switch ($var) {
case 'TEST-1': case 'TEST-2': case 'TEST-2':
do something
}
Curt
--
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Re: [PHP] Control Structure problem
yeah, i really like using cases they work well and especially if you want to
do something different for different values, i forgot about that, its a good
way to do it,
does php have case else? cuz that is a really handy thing in VB that people
often forget...
Luke
- Original Message -
From: Curt Zirzow [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, September 17, 2003 10:49 AM
Subject: Re: [PHP] Control Structure problem
* Thus wrote Chris W. Parker ([EMAIL PROTECTED]):
Dan J. Rychlik mailto:[EMAIL PROTECTED]
on Tuesday, September 16, 2003 5:12 PM said:
Thank you guys. I truly know the level of expertise on this mailing
list, and I know that it proves invaluable.
p.p.s. I totally think that the syntax you presented is logical and
should be available. It makes much more sense to me to do it the way you
did, but alas...
Well technically you can do it like:
switch ($var) {
case 'TEST-1': case 'TEST-2': case 'TEST-2':
do something
}
Curt
--
I used to think I was indecisive, but now I'm not so sure.
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RE: [PHP] Control Structure problem
are you thinking of default: ?
-Original Message-
From: Luke Skywalker [mailto:[EMAIL PROTECTED]
Sent: Wednesday, 17 September 2003 10:51 AM
To: [EMAIL PROTECTED]
Subject: Re: [PHP] Control Structure problem
yeah, i really like using cases they work well and especially if you want to
do something different for different values, i forgot about that, its a good
way to do it,
does php have case else? cuz that is a really handy thing in VB that people
often forget...
Luke
- Original Message -
From: Curt Zirzow [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, September 17, 2003 10:49 AM
Subject: Re: [PHP] Control Structure problem
* Thus wrote Chris W. Parker ([EMAIL PROTECTED]):
Dan J. Rychlik mailto:[EMAIL PROTECTED]
on Tuesday, September 16, 2003 5:12 PM said:
Thank you guys. I truly know the level of expertise on this mailing
list, and I know that it proves invaluable.
p.p.s. I totally think that the syntax you presented is logical and
should be available. It makes much more sense to me to do it the way you
did, but alas...
Well technically you can do it like:
switch ($var) {
case 'TEST-1': case 'TEST-2': case 'TEST-2':
do something
}
Curt
--
I used to think I was indecisive, but now I'm not so sure.
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Re: [PHP] Control Structure problem
Yeah, thats exactly what im thinking, and speaking of it, im going to start
using it a lot more :)
thanks
Luke
- Original Message -
From: Martin Towell [EMAIL PROTECTED]
To: 'Luke Skywalker' [EMAIL PROTECTED];
[EMAIL PROTECTED]
Sent: Wednesday, September 17, 2003 10:51 AM
Subject: RE: [PHP] Control Structure problem
are you thinking of default: ?
-Original Message-
From: Luke Skywalker [mailto:[EMAIL PROTECTED]
Sent: Wednesday, 17 September 2003 10:51 AM
To: [EMAIL PROTECTED]
Subject: Re: [PHP] Control Structure problem
yeah, i really like using cases they work well and especially if you want
to
do something different for different values, i forgot about that, its a
good
way to do it,
does php have case else? cuz that is a really handy thing in VB that
people
often forget...
Luke
- Original Message -
From: Curt Zirzow [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, September 17, 2003 10:49 AM
Subject: Re: [PHP] Control Structure problem
* Thus wrote Chris W. Parker ([EMAIL PROTECTED]):
Dan J. Rychlik mailto:[EMAIL PROTECTED]
on Tuesday, September 16, 2003 5:12 PM said:
Thank you guys. I truly know the level of expertise on this mailing
list, and I know that it proves invaluable.
p.p.s. I totally think that the syntax you presented is logical and
should be available. It makes much more sense to me to do it the way
you
did, but alas...
Well technically you can do it like:
switch ($var) {
case 'TEST-1': case 'TEST-2': case 'TEST-2':
do something
}
Curt
--
I used to think I was indecisive, but now I'm not so sure.
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Re: [PHP] Control Structure problem
On Wed, Sep 17, 2003 at 12:49:03AM +, Curt Zirzow wrote:
:
: switch ($var) {
: case 'TEST-1': case 'TEST-2': case 'TEST-2':
: do something
: }
The switch statement doesn't do an equivalency test, does it? So while
this switch statement can be rewritten as:
if (($var == 'TEST-1') || ($var == 'TEST-1') || ($var == 'TEST-1'))
{
do something
}
it doesn't do:
if (($var === 'TEST-1') || ($var === 'TEST-1') || ($var === 'TEST-1'))
{
do something
}
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Re: [PHP] Control Structure problem
* Thus wrote Eugene Lee ([EMAIL PROTECTED]):
On Wed, Sep 17, 2003 at 12:49:03AM +, Curt Zirzow wrote:
The switch statement doesn't do an equivalency test, does it? So while
this switch statement can be rewritten as:
if (($var == 'TEST-1') || ($var == 'TEST-1') || ($var == 'TEST-1'))
{
do something
}
it doesn't do:
if (($var === 'TEST-1') || ($var === 'TEST-1') || ($var === 'TEST-1'))
{
do something
}
Correct. Although in most cases == is a good enough test.
Curt
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Re[2]: [PHP] Control Structure problem
Hi,
Wednesday, September 17, 2003, 11:47:45 AM, you wrote:
EL On Wed, Sep 17, 2003 at 12:49:03AM +, Curt Zirzow wrote:
EL :
EL : switch ($var) {
EL : case 'TEST-1': case 'TEST-2': case 'TEST-2':
EL : do something
EL : }
EL The switch statement doesn't do an equivalency test, does it? So while
EL this switch statement can be rewritten as:
EL if (($var == 'TEST-1') || ($var == 'TEST-1') || ($var == 'TEST-1'))
EL {
EL do something
EL }
EL it doesn't do:
EL if (($var === 'TEST-1') || ($var === 'TEST-1') || ($var === 'TEST-1'))
EL {
EL do something
EL }
You can do it this way I think :)
switch (true) {
case ($var === 'TEST-1')?true:false:
case ($var === 'TEST-2')?true:false:
case ($var === 'TEST-2')?true:false:
do something
}
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regards,
Tom
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Re: [PHP] Control Structure problem
On Wed, Sep 17, 2003 at 01:29:26PM +1000, Tom Rogers wrote:
: Wednesday, September 17, 2003, 11:47:45 AM, Eugene Lee wrote:
:
: EL The switch statement doesn't do an equivalency test, does it?
[...]
: EL it doesn't do:
:
: EL if (($var === 'TEST-1') ||
: EL($var === 'TEST-1') ||
: EL($var === 'TEST-1'))
: EL {
: EL do something
: EL }
:
: You can do it this way I think :)
:
: switch (true) {
: case ($var === 'TEST-1')?true:false:
: case ($var === 'TEST-2')?true:false:
: case ($var === 'TEST-2')?true:false:
:do something
: }
Oh man, that's just sick...
I guess, for the sake of performance and readability, it's probably
easier to do an is_string($var) (or whatever variable type) before
doing a normal switch statement.
Still... that's just sick...
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Re: [PHP] Control Structure problem
--- Eugene Lee [EMAIL PROTECTED] wrote:
: switch (true) {
: case ($var === 'TEST-1')?true:false:
: case ($var === 'TEST-2')?true:false:
: case ($var === 'TEST-2')?true:false:
:do something
: }
Oh man, that's just sick...
Partially because it's unnecessarily complex. This is like saying:
if ($var === 'TEST-1')
{
$expression = true;
}
else
{
$expression = false;
}
if ($expression)
{
...
While the ternary operator makes this redundancy less obvious, it only adds to
the complexity and lack of readability. Consider the following code as a
substitute for the above example:
if ($var === 'TEST-1')
{
...
Hopefully that part is clear. Now, on to the original question. Try this
example:
?
$foo = 'bar';
switch (true)
{
case ($foo === 'notbar'):
echo 'A';
break;
case ($foo === 'bar');
echo 'B';
break;
default:
echo 'C';
break;
}
?
This should output B. You will also notice that it works when you switch on
$foo instead of the boolean true, but this is misleading. PHP converts $foo to
the boolean true when comparing to the expressions, because we set it to the
string bar. To understand this point further, try this example:
?
$foo = 0;
switch ($foo)
{
case ($foo === 'notbar'):
echo 'A';
break;
case ($foo === 0);
echo 'B';
break;
default:
echo 'C';
break;
}
?
This should also output B. That seems to be wrong, but in this case it is
comparing each expression to $foo, which is the integer 0 in this case, so it
evaluates to false. So, you will see A, because ($foo === 'notbar') also
evaluates to false.
Recap:
1. You can switch on anything, including boolean values.
2. Your cases can be expressions to be evaluated.
Hope that helps.
Chris
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Re: Re[2]: [PHP] Control Structure problem
--- Tom Rogers [EMAIL PROTECTED] wrote: This is why you need this construct $foo = 0; switch (true) You must have missed example 1. :-) which now works as expected Both examples work as expected, of course. Chris = Become a better Web developer with the HTTP Developer's Handbook http://httphandbook.org/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Control Structure Problem
This is driving me nuts. I couldn't sleep much last night trying
to figure this out.
This code assigns rooms to kids signing up for Sunday school
at a very large church. Each subsequent registration is put into
the next room on the list. It looks up in the MySQL database
the room the last person in that age category and hour was
assigned and assigns the current person the next one. If someone
is the first person they get assigned the first room. However if
they are the first person ${newroom.$x} doesn't get assigned
to anything. But thereafter it works fine. I've had a couple other
problems and am wondering if there is a better way to do this
or if I have any syntax problems. Thanks.
Jeff Oien
$x = 1;
while ($x = $Number_Children) {
if (${category.$x} == 'SS KidZone - Kindergarten') {
if ((${Grade.$x}) == 'K' (${selection.$x}) == '2nd Hour') {
$sql = SELECT * FROM $table_name WHERE Category = 'SS KidZone - Kindergarten'
Element1 = '2nd Hour' ORDER by ID desc;
$result = @mysql_query($sql,$connection) or die(Couldn't execute query);
if ($row = mysql_fetch_array($result)) {
$room = $row['Element2'];
if ($room == 'C143 Pink Check') {
${newroom.$x} = 'C143 Pink Dot';
}
if ($room == 'C143 Pink Dot') {
${newroom.$x} = 'C148 Teal Check';
}
if ($room == 'C148 Teal Check') {
${newroom.$x} = 'C148 Teal Dot';
}
if ($room == 'C148 Teal Dot') {
${newroom.$x} = 'C143 Pink Check';
}
}
else { ${newroom.$x} = 'C143 Pink Check'; }
}
do database insertion
}
$x++;
}
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RE: [PHP] Control Structure Problem
I forgot to say I deleted tabs so that the width might fit in a
typical mail reader.
Jeff Oien
This code assigns rooms to kids signing up for Sunday school
at a very large church. Each subsequent registration is put into
the next room on the list. It looks up in the MySQL database
the room the last person in that age category and hour was
assigned and assigns the current person the next one. If someone
is the first person they get assigned the first room. However if
they are the first person ${newroom.$x} doesn't get assigned
to anything. But thereafter it works fine. I've had a couple other
problems and am wondering if there is a better way to do this
or if I have any syntax problems. Thanks.
Jeff Oien
$x = 1;
while ($x = $Number_Children) {
if (${category.$x} == 'SS KidZone - Kindergarten') {
if ((${Grade.$x}) == 'K' (${selection.$x}) == '2nd Hour') {
$sql = SELECT * FROM $table_name WHERE Category = 'SS KidZone - Kindergarten'
Element1 = '2nd Hour' ORDER by ID desc;
$result = @mysql_query($sql,$connection) or die(Couldn't execute query);
if ($row = mysql_fetch_array($result)) {
$room = $row['Element2'];
if ($room == 'C143 Pink Check') {
${newroom.$x} = 'C143 Pink Dot';
}
if ($room == 'C143 Pink Dot') {
${newroom.$x} = 'C148 Teal Check';
}
if ($room == 'C148 Teal Check') {
${newroom.$x} = 'C148 Teal Dot';
}
if ($room == 'C148 Teal Dot') {
${newroom.$x} = 'C143 Pink Check';
}
}
else { ${newroom.$x} = 'C143 Pink Check'; }
}
do database insertion
}
$x++;
}
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