- get_cfg_var: documentation ( source)
<?php
$phpSelf = $_SERVER['PHP_SELF'] ? $_SERVER['PHP_SELF'] : $_SERVER['SCRIPT_NAME'];
$disFuns=get_cfg_var("disable_functions");
echo (false!==eregi("phpinfo",$disFuns))? '<font color="red">×</font>' :"<a href='$phpSelf?act=phpinfo' target='_blank'>PHPINFO</a>";