mysqli::rollback
(PHP 5, PHP 7)
mysqli :: rollback - mysqli_rollback - 回退当前事务
描述
面向对象的风格
bool mysqli::rollback ([ int $flags [, string $name ]] )程序风格
bool mysqli_rollback ( mysqli $link [, int $flags [, string $name ]] )回滚数据库的当前事务。
参数
`link` 仅过程样式：由mysqli_connect（）或mysqli_init（）返回的链接标识符
flags
MYSQLI_TRANS_COR_*常量的位掩码。
name
如果提供，则执行ROLLBACK / * name * /。
返回值
成功返回TRUE或失败时返回FALSE。
更新日志
版 | 描述 |
|---|---|
5.5.0 | 添加标志和名称参数。 |
例子
示例＃1 mysqli :: rollback（）示例
面向对象的风格
<?php
$mysqli?=?new?mysqli("localhost",?"my_user",?"my_password",?"world");
/*?check?connection?*/
if?(mysqli_connect_errno())?{
????printf("Connect?failed:?%s\n",?mysqli_connect_error());
????exit();
}
/*?disable?autocommit?*/
$mysqli->autocommit(FALSE);
$mysqli->query("CREATE?TABLE?myCity?LIKE?City");
$mysqli->query("ALTER?TABLE?myCity?Type=InnoDB");
$mysqli->query("INSERT?INTO?myCity?SELECT?*?FROM?City?LIMIT?50");
/*?commit?insert?*/
$mysqli->commit();
/*?delete?all?rows?*/
$mysqli->query("DELETE?FROM?myCity");
if?($result?=?$mysqli->query("SELECT?COUNT(*)?FROM?myCity"))?{
????$row?=?$result->fetch_row();
????printf("%d?rows?in?table?myCity.\n",?$row[0]);
????/*?Free?result?*/
????$result->close();
}
/*?Rollback?*/
$mysqli->rollback();
if?($result?=?$mysqli->query("SELECT?COUNT(*)?FROM?myCity"))?{
????$row?=?$result->fetch_row();
????printf("%d?rows?in?table?myCity?(after?rollback).\n",?$row[0]);
????/*?Free?result?*/
????$result->close();
}
/*?Drop?table?myCity?*/
$mysqli->query("DROP?TABLE?myCity");
$mysqli->close();
?>程序风格
<?php
$link?=?mysqli_connect("localhost",?"my_user",?"my_password",?"world");
/*?check?connection?*/
if?(mysqli_connect_errno())?{
????printf("Connect?failed:?%s\n",?mysqli_connect_error());
????exit();
}
/*?disable?autocommit?*/
mysqli_autocommit($link,?FALSE);
mysqli_query($link,?"CREATE?TABLE?myCity?LIKE?City");
mysqli_query($link,?"ALTER?TABLE?myCity?Type=InnoDB");
mysqli_query($link,?"INSERT?INTO?myCity?SELECT?*?FROM?City?LIMIT?50");
/*?commit?insert?*/
mysqli_commit($link);
/*?delete?all?rows?*/
mysqli_query($link,?"DELETE?FROM?myCity");
if?($result?=?mysqli_query($link,?"SELECT?COUNT(*)?FROM?myCity"))?{
????$row?=?mysqli_fetch_row($result);
????printf("%d?rows?in?table?myCity.\n",?$row[0]);
????/*?Free?result?*/
????mysqli_free_result($result);
}
/*?Rollback?*/
mysqli_rollback($link);
if?($result?=?mysqli_query($link,?"SELECT?COUNT(*)?FROM?myCity"))?{
????$row?=?mysqli_fetch_row($result);
????printf("%d?rows?in?table?myCity?(after?rollback).\n",?$row[0]);
????/*?Free?result?*/
????mysqli_free_result($result);
}
/*?Drop?table?myCity?*/
mysqli_query($link,?"DROP?TABLE?myCity");
mysqli_close($link);
?>上面的例子会输出：
0 rows in table myCity.
50 rows in table myCity (after rollback).扩展内容
- mysqli_begin_transaction（） - 启动一个事务
- mysqli_commit（） - 提交当前事务
- mysqli_autocommit（） - 打开或关闭自动提交数据库修改
- mysqli_release_savepoint（） - 从当前事务的一组保存点中删除指定的保存点
← mysqli::release_savepoint
mysqli::rpl_query_type →
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