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Date: Fri, 6 Aug 2004 03:03:47 +0000
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Subject: Re: [PHP-DEV] Variable Variables and Superglobals
From: curt@php.net (Curt Zirzow)

* Thus wrote A.Rico:
>    What the PHP documentation says about variable variables and 
> superglobals is that you can't use them as a "pointer":
> 
>    /*Warning*/
> 
>    / Please note that variable variables cannot be used with PHP's
>    Superglobal arrays
>    <http://www.php.net/manual/en/language.variables.predefined.php#language.variables.superglobals>.
>    This means you cannot do things like ${$_GET}. If you are looking
>    for a way to handle availability of superglobals and the old
>    HTTP_*_VARS, you might want to try referencing
>    <http://www.php.net/manual/en/language.references.php> them. /
> 
> what I intended was to use a "normal" globally defined variable to 
> "point" to a superglobal; that, in fact, works in the global scope, but 
> not in the function scope:
> 
> // Code //////////////////////////////////////////////////////////////
> $varvar="_ENV";
> 
> echo $_ENV["OS"]; // --> Windows NT
> echo ${$varvar}; // --> Windows NT

This is a documentation issue, i believe, as noted on:
  http://php.net/variables.predefined

Variable variables super globals aren't allowed inside functions or
methods. The waring on the page you reference is fixed in the docs
reflecting this.

Curt
-- 
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