交表单数据到你的网站，给安全造成了问题

<?phpclass Crumb{ ???const SALT = ‘http:test.com‘; ???static $ttl = 7200; ???static public function issueCrumb($uid, $ttl=7200, $action= -1) ???{ ???????if(intval($ttl)>7200) self::$ttl = $ttl; ???????$i = ceil(time() / self::$ttl); ???????return substr(self::challenge($i . $action . $uid), -12, 10); ????} ???static public function challenge($data) ???{ ???????return hash_hmac(‘md5‘,$data, self::SALT); ???} ???static public function verifyCrumb($uid,$crumb, $action= -1) ???{ ???????$i = ceil(time() / self::$ttl); ???????if(substr(self::challenge($i . $action . $uid), -12, 10) == $crumb || substr(self::challenge(($i-1) . $action . $uid), -12, 10) == $crumb){ ???????????return true; ???????}else{ ???????????return false; ???????} ???????}}$crumb = Crumb::issueCrumb(1);//var_dump($crumb);//die;$crumb = ‘fc3c0f7c23‘;$ver = Crumb::verifyCrumb(1,$crumb);var_dump($ver);