PHP PDO事务提交mysql语句

$db = new PDO ( 'mysql:host=' . $cfg ['hostanme'] . ';dbname=' . $cfg ['dbname'], $cfg ['username'], $cfg ['password'] );		$db->exec ( "set character_set_client = utf8" );		$db->exec ( "SET character_set_results =utf8" );		$db->exec ( "SET character_set_connection = utf8" );				$db->query ( "BEGIN" ); // 事务开始				$calories ="sa阿萨德";		$sth = $db->prepare(' INSERT INTO `test_user`  values ( null,1, :calories);');		$sth->execute(array(':calories' => $calories ));				$sths = $db->prepare(' INSERT INTO `test_users`  values ( null,1, :calories);');		$sths->execute(array(':calories' => $calories )); //故意写错的				$lastid = $db->lastInsertId();						$sd = $sth->rowCount();

DROP PROCEDURE IF EXISTS pro_rep_shadow_rs;create procedure pro_rep_shadow_rs(out rtn int)   begin       -- 如果出现异常，会自动处理并rollback    declare exit handler for  sqlexception ROLLBACK ;     		           -- 启动事务       start transaction;       insert into test_user values(NULL,1,'啊是大三的');		insert into test_user VALUES(NULL,23,'sdsd',ss); --故意写错的           -- 运行没有异常，提交事务       commit;       -- 设置返回值为1      set rtn=1;   end;