[PHP] Re: Expand variable in comparison

[Marcus]

Andrés Robinet wrote:
-----Original Message-----
From: news [mailto:[EMAIL PROTECTED] On Behalf Of Marcus
Sent: Friday, January 18, 2008 9:56 PM
To: php-general@lists.php.net
Subject: [PHP] Re: Expand variable in comparison
Andrés Robinet wrote:
-----Original Message-----
From: news [mailto:[EMAIL PROTECTED] On Behalf Of Marcus
Sent: Friday, January 18, 2008 4:51 PM
To: php-general@lists.php.net
Subject: [PHP] Expand variable in comparison

Hi!


Is there any way to get the following snippet returning a true?


...
$this->var = ?????
if ($this->var == $preDefinedStringToTestWith)
     return true;
else
     false;



The problem:
I don't know, what $preDefinedStringToTestWith is!
$this->var can be set to any string.

I tried
$this->var = "${preDefinedStringToTestWith}"
but this doesn't get expanded.

Uh! Shouldn't it work?

$this->var = $preDefinedStringToTestWith
For certain reason $this->var can only be set to a string and not to a
variable!

Any suggestions?

I don't understand what you are trying to do, 

I do only have control over the content of this variable itself (Comes from 
$_REQUEST) - not over the code.



but maybe you are trying to achieve something like:

<?php
class Test {
        var $var = '';
        function Test() {
                $this->var = "theVariableName"; // Hold variable name
                $theVariableName = "whatever you want";
                if (${$this->var} == $theVariableName)
                      echo ${$this->var}." is equal to ".$theVariableName;
                else
                      echo "bad dog! stop it!";
        }
}

new Test();
?>

Nearly, but I can only alter the content of $var itself!
I cannot change the comparison.
Comparison is always
if ($this->var == $preDefinedStringToTestWith)

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