# mysqlnd_ms_xa_rollback

(PECL mysqlnd_ms < 1.6.0)

mysqlnd_ms_xa_rollback — Rolls back a distributed/XA transaction among MySQL servers

### 说明

mysqlnd_ms_xa_rollback ( mixed `$connection` , string `$gtrid` ) : int

Rolls back a global transaction among MySQL servers started by mysqlnd_ms_xa_begin().

If any of the global transaction participants fails to rollback the situation is left to be solved by the garbage collection.

> Note: Experimental

> The feature is currently under development. There may be issues and/or feature limitations. Do not use in production environments.

### 参数

`connection`

  A MySQL connection handle obtained from any of the connect functions of the mysqli, mysql or PDO_MYSQL extensions.

`gtrid`

  Global transaction identifier (gtrid).

### 返回值

Returns `TRUE` if the global transaction has been rolled back. Otherwise, returns `FALSE`

### 参见

- Quickstart XA/Distributed transactions
- Runtime configuration
- mysqlnd_ms_get_stats() - Returns query distribution and connection statistics