ob_end_clean 出错了，求教！

error_reporting(E_ALL);set_error_handler(array('test', 'handle_error'));if(function_exists('ob_gzhandler')) {    ob_start('ob_gzhandler');} else {    ob_start();}class test {        public static function handle_error($errno, $errstr, $errfile, $errline) {        if($errno) {             debug::system_error($errstr);        }    }}class debug {        public static function system_error($message) {        ob_end_clean();                echo $message;                exit;    }}echo '错误前信息<br/>';trigger_error('错误内容');

error_reporting(E_ALL);set_error_handler(array('test', 'handle_error'));if(function_exists('ob_gzhandler')) {    ob_start('my_ob_gzhandler');} else {    ob_start();}class test {    public static function handle_error($errno, $errstr, $errfile, $errline) {        if($errno) {            debug::system_error($errstr);        }    }}class debug {    public static function system_error($message) {        ob_clean();        echo $message;        exit;    }}echo '错误前信息<br/>';trigger_error('ddddddddddddddddddddddddd误内容');function my_ob_gzhandler($buffer,$mod){    header("Content-Encoding: gzip");    return gzencode($buffer, 9, FORCE_GZIP);}