# Session::startTransaction

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Session::startTransaction — Start transaction

### 说明

public mysql_xdevapi\Session::startTransaction(): void

Start a new transaction.

### 参数

此函数没有参数。

### 返回值

An SqlStatementResult object.

### 示例

示例 #1 mysql_xdevapi\Session::startTransaction() example

`<?php
$session = mysql_xdevapi\getSession("mysqlx://user:password@localhost");
$collection = $session->getSchema("addressbook")->getCollection("friends");
$session->startTransaction();
$collection->add( '{"test1":1, "test2":2}' )->execute();
$savepoint = $session->setSavepoint();
$collection->add( '{"test3":3, "test4":4}' )->execute();
$session->releaseSavepoint($savepoint);
$session->rollback();
?>`
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