#50929 [Opn->Bgs]: Incorrect initialization of $_SERVER

From: Date: Wed, 03 Feb 2010 18:42:38 +0000
Subject: #50929 [Opn->Bgs]: Incorrect initialization of $_SERVER
References: 1  Groups: php.bugs 
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 ID:               50929
 Updated by:       jani@php.net
 Reported By:      t-bader at gmx dot net
-Status:           Open
+Status:           Bogus
 Bug Type:         Variables related
 Operating System: Windows Vista/7
 PHP Version:      5.3.1
 New Comment:

You have just discovered JIT initialization of superglobals:

http://www.php.net/manual/en/ini.core.php#ini.auto-globals-jit

(note the Warning there..)


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

[2010-02-03 18:12:12] t-bader at gmx dot net

Description:
------------
The manual says that Superglobals can be referenced by variable
variables in global scope.

For the $_SERVER superglobal does this only work at it first "normal"
usage.

<?php
$Superglobal = '_SERVER';
var_dump($$Superglobal);
?> 

Outputs: NULL

But if i use the $_SERVER Variable after the var_dump(); the
var_dump()s output is correct:

<?php
$Superglobal = '_SERVER';
var_dump($$Superglobal);

$_SERVER;

var_dump($$Superglobal);
?> 

Both var_dump()s output the whole $_SERVER array. If i remove the line
with $_SERVER; both var_dump()s output is NULL.


Reproduce code:
---------------
<?php
$Superglobal = '_SERVER';
var_dump($$Superglobal);
?> 

Expected result:
----------------
Array containing the $_SERVER variables

Actual result:
--------------
NULL


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


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