<?php echo $_REQUEST['action']; Security::getRequestData('action'); echo $_POST['action']; Security::getRequestData('action', 'post'); echo $_GET[$action]; Security::getRequestData($action, 'get'); class Security { function getRequestData($var) { echo $_REQUEST[$var]; } } class Insecurity { function getRequestData($var) { unset($_REQUEST[$var]); echo 'OMGHAX!'; } } $sample = Util::getArrayIndex($_REQUEST, 'sample', ''); $syntax = Util::getArrayIndex($_REQUEST, 'syntax', ''); $value = Util::getArrayIndex($_FILES, $key, $default); ?>