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();  

?>