<?php
 
// Unregister_globals: unsets all global variables set from a superglobal array
// --------------------
// This is useful if you don't know the configuration of PHP on the server the application
// will be run
// Place this in the first lines of all of your scripts
// Don't forget that the register_global of $_SESSION is done after session_start() so after
// each session_start() put a unregister_globals('_SESSION');
 
function unregister_globals()
{
    if (!ini_get('register_globals'))
    {
        return false;
    }
 
    foreach (func_get_args() as $name)
    {
        foreach ($GLOBALS[$name] as $key=>$value)
        {
            if (isset($GLOBALS[$key]))
                unset($GLOBALS[$key]);
        }
    }
}
 
unregister_globals('_POST', '_GET', '_COOKIE', '_REQUEST', '_SERVER', '_ENV', '_FILES');
 
?>