[PHP-DOC] #17017 [Dup->Csd]: Can't use variable variables on superglobals within functions and methods From: sniper <email protected>
Date: 08/23/02

 ID: 17017
 Updated by: sniper <email protected>
 Reported By: lennart.mulder <email protected>
-Status: Duplicate
+Status: Closed
 Bug Type: Documentation problem
 Operating System: Any
 PHP Version: 4.1 and higher
 New Comment:

Documented here:

http://www.php.net/manual/en/language.variables.variable.php

Previous Comments:
------------------------------------------------------------------------

[2002-05-05 13:12:17] mfischer <email protected>

Reclassified as documentation problem, updated subject.

------------------------------------------------------------------------

[2002-05-05 13:00:19] mfischer <email protected>

Known limitation.

I don't know yet if this has been documented already, there's another
report about this issue though.

Marking as duplicate for now.

------------------------------------------------------------------------

[2002-05-05 12:58:27] lennart.mulder <email protected>

Hello :-)

The definition of a variable variable as superglobal works fine when
put in the main coding (i.e. not within a function or method).
Example:

<?php

$aVariable = 'GET';
echo ${"_{$aVariable}"};

?>

The system output is: Array

In the next example however, where the same code is put into a
function, the resulting output is a error message instead:

<?php

function aFunction()
{
   $aVariable = 'GET';
   echo ${"_{$aVariable}"};
}
aFunction();

?>

The system output is: Notice: Undefined variable: _GET in Bestand.php
on line 6.

Also when $_GET has been defined as global (which should not be
necessary) this malfunction remains.

Suggested intermediate solution:

<?php

function aFunction()
{
   $aVariable = 'GET';
   echo $GLOBALS["_{$aVariable}"];
}
aFunction();

?>

------------------------------------------------------------------------ 

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Edit this bug report at http://bugs.php.net/?id=17017&edit=1

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