function checkext($ext) { skipif(!extension_loaded($ext), "need ext/$ext"); }
function checkver($ver) { skipif($ver > (int) PHP_VERSION, "need PHP v$ver"); }
function checkurl($url) { skipif(!@fsockopen($url, 80), "$url not responsive"); }
+function checkcls($cls) { skipif(!class_exists($cls), "need class $cls"); }
checkext('http');
?>