Detailed explanation of commonly used methods for PHP mysqli transaction operations-PHP Tutorial-php.cn

Detailed explanation of commonly used methods for PHP mysqli transaction operations

墨辰丷

Release： 2023-03-26 19:08:01

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This article mainly introduces the common methods of PHP mysqli transaction operation, and analyzes the opening, submission, execution, rollback, closing and other implementation techniques of PHP mysqli transaction in the form of examples. Friends who need it can refer to it

The examples in this article describe common methods of PHP mysqli transaction operations. Share it with everyone for your reference, the details are as follows:

//打开(true)或关闭(false)本次数据库连接的自动命令提交事务模式
//参数如果设置为 FALSE，则表示关闭 auto-commit。如果设置为 TRUE，则表示开启 auto-commit（提交任何等待查询）。
bool mysqli::autocommit ( bool $mode )

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//回退当前事务
bool mysqli::rollback ()

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3、

//提交一个事务
bool mysqli::commit ()

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4、

//关闭先前打开的数据库连接
bool mysqli::close ()

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//对数据库执行一次查询
//失败时返回 FALSE，通过mysqli_query() 成功执行SELECT, SHOW, DESCRIBE或 EXPLAIN查询会返回一个mysqli_result 对象，其他查询则返回TRUE
//参数$resultmode可选。一个常量。可以是下列值中的任意一个：
//MYSQLI_USE_RESULT（如果需要检索大量数据，请使用这个）
//MYSQLI_STORE_RESULT（默认）
mixed mysqli::query ( string $query [, int $resultmode = MYSQLI_STORE_RESULT ] )

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Code example:

<?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,&#39;000&#39;)");
//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,&#39;111&#39;)");
$b2 = $mysqli->query("INSERT INTO test (id,name) values (2,&#39;222&#39;)");
//有一条失败则回滚，全部成功则提交
if(!$res1 || !$b2){
  echo &#39;回滚！&#39;;
  $mysqli->rollback();
} else {
  echo &#39;提交！&#39;;
  $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,&#39;333&#39;)");
//关闭连接
$mysqli->close();
?>

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