echo self::$c, "\n"; echo " this is static"; } function test1() { $str = $this->str; $a = substr_replace($str, "uuuu", 2, 3); $b = str_replace("ell", 'wwww', $str); return array($a, $b); } function __destruct() { } } class iclass { } //echo me::$c; //me::t(); $a = new me('hello world'); $b = $a->test(); //var_dump($b); //$af=strrev("meihao"); //var_dump($af); $d = $a->test1(); //var_dump($d); $email = "meihao@@126.com"; $url = "http://www.baidu.com"; $r = filter_var($email, FILTER_VALIDATE_EMAIL); $rr = filter_var($url, FILTER_VALIDATE_URL); var_dump($r, $rr);