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Doc Bug #15696 Can't set/unset global-ed variables
Submitted: 2002-02-24 10:10 UTC Modified: 2002-02-24 12:04 UTC
From: marekm at aptus dot pl Assigned:
Status: Closed Package: Documentation problem
PHP Version: 4.1.1 OS: Linux & Win32
Private report: No CVE-ID: None
View Developer Edit
 [2002-02-24 10:10 UTC] marekm at aptus dot pl 
I'm running the following script:

$id=1;
function test()
{
	global $id;
	unset($id);
}
test();
echo($id);

As the function test is being executed I think, the $id variable should be unset and so the script should output nothing, but it outputs 1. It IS possible to change the value od $id inside the 'test' function, it's just not possible to change the set/unset state. 
It's easy to omit the problem by unsetting $GLOBALS["id"] variable, but I think it should be possible to unset the global-ed variable in both ways.
The problem affects all PHP 4.x versions. The 3.x versions work as I expect.

Regards,
Marek Matula

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 [2002-02-24 10:12 UTC] derick@php.net 
The bug system is not the appropriate forum for asking support
questions. For a list of a range of more appropriate places to ask
for help using PHP, please visit http://www.php.net/support.php
 [2002-02-24 10:27 UTC] yohgaki@php.net 
Read manual about reference. You are unsetting reference to global. Not the actual var.
 [2002-02-24 10:52 UTC] marekm at aptus dot pl 
OK, I know that.
I was just moving an old PHP3 script to PHP4 and noticed that problem.
Anyway, there's nothing mentioned in "Migrating from PHP 3.0 to PHP 4.0" section of the manual about this (significant I think) change. 

Thanks for the reply,

Marek Matula
 [2002-02-24 11:46 UTC] mfischer@php.net 
Re-Opening as documentation problem.
 [2002-02-24 12:04 UTC] nohn@php.net 
This bug has been fixed in CVS.

Fixed this bug in cvs. I hope the description is well enough...
 
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