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Undo the harm done by register_globals set to on

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Thu. Jul. 27th, 2006 4:56 AM

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rastersize

"register | globals" | PHP

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This snippet will undo all the nasty stuff which happens when you set register_globals to on in your php.ini file.

(Originally found in the code of Wordpress).

// Let us unset all global variables set by register globals

if(ini_get('register_globals') == true)

{

        if(isset($_REQUEST['GLOBALS']))

                exit('GLOBALS overwrite attempt detected! Exiting...');

        // Variables that shouldn't be unset

        $noUnset = array('GLOBALS', '_GET', '_POST', '_COOKIE', '_REQUEST', '_SERVER', '_ENV', '_FILES');

        $input = array_merge($_GET, $_POST, $_COOKIE, $_SERVER, $_ENV, $_FILES, isset($_SESSION) && is_array($_SESSION) ? $_SESSION : array());

        foreach($input as $k => $v) 

                if(!in_array($k, $noUnset) && isset($GLOBALS[$k]))

                        unset($GLOBALS[$k]);

}