php事务回滚

<?php  
$mysqli = new mysqli("127.0.0.1","root","111111","test");  
if ($mysqli->connect_errno){  
    echo "Failed to connect to MySQL: " . $mysqli->connect_error;  
}  
//默认auto-commit 是打开的，可直接提交sql语句  
$b1 = $mysqli->query("INSERT INTO test (id,name) values (0,'000')");  
//若要执行事务，先关闭auto-commit  
//关闭 auto-commit  
$mysqli->autocommit(false);  
$res1 = $mysqli->query("INSERT INTO test (id,n1ame) values (1,'111')");  
$b2 = $mysqli->query("INSERT INTO test (id,name) values (2,'222')");  
//有一条失败则回滚，全部成功则提交  
if(!$res1 || !$b2){  
    echo '回滚！';  
    $mysqli->rollback();  
} else {  
    echo '提交！';  
    $mysqli->commit();  
}  
//若想再次自动提交非事务语句，要打开auto-commit  
$mysqli->autocommit(true);  
$b3 = $mysqli->query("INSERT INTO test (id,name) values (3,'333')");  
//关闭连接  
$mysqli->close();  
  
?>