Re: Variable Variables and Superglobals

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 foo($varvar); function foo($arg){ $lvar="_ENV"; echo $_ENV["OS"]; // --> Windows NT echo ${$arg}["OS"]; // --> *nothing* echo ${$lvar}["OS"]; // --> *nothing* var_dump( $$arg ); // --> NULL var_dump( $$lvar); // --> NULL } // END ////////////////////////////////////////////////////////////// Regards, A. Rico