mysqli::autocommit

    mysqli_autocommit

    (PHP 5, PHP 7, PHP 8)

    mysqli::autocommit -- mysqli_autocommit — 打开或关闭本次数据库连接的自动命令提交事务模式

    说明

    面向对象风格

    publicmysqli::autocommit(bool$enable): bool

    过程化风格

    mysqli_autocommit(mysqli$mysql, bool$enable): bool

    打开或关闭本次数据库连接的自动命令提交事务模式。

    如需要确认当前连接的自动事务提交状态，可执行这个 SQL 请求 SELECT @@autocommit。

    参数

    mysql

    仅以过程化样式：由 mysqli_connect() 或 mysqli_init() 返回的 mysqli 对象。

    enable

    是否开启自动提交。

    返回值

    成功时返回 true， 或者在失败时返回 false。

    错误／异常

    If mysqli error reporting is enabled (MYSQLI_REPORT_ERROR) and the requested operation fails, a warning is generated. If, in addition, the mode is set to MYSQLI_REPORT_STRICT, a mysqli_sql_exception is thrown instead.

    示例

    示例 #1 mysqli::autocommit() 示例

    面向对象风格

    <?php


    mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

    $mysqli = new mysqli("localhost", "my_user", "my_password", "world");


    $mysqli->query("CREATE TABLE IF NOT EXISTS language (
    Code text NOT NULL,
    Speakers int(11) NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;"    );


    $mysqli->autocommit(false);

    $result = $mysqli->query("SELECT @@autocommit");
    $row = $result->fetch_row();
    printf("Autocommit is %s\n", $row[0]);

    try {

    $stmt = $mysqli->prepare('INSERT INTO language(Code, Speakers) VALUES (?,?)');
    $stmt->bind_param('ss', $language_code, $native_speakers);


    $language_code = 'DE';
    $native_speakers = 50_123_456;
    $stmt->execute();
    $language_code = 'FR';
    $native_speakers = 40_546_321;
    $stmt->execute();


    $mysqli->commit();
    print     "Committed 2 rows in the database\n";

    $result = $mysqli->query("SELECT @@autocommit");
    $row = $result->fetch_row();
    printf("Autocommit is %s\n", $row[0]);


    $language_code = 'PL';
    $native_speakers = 30_555_444;
    $stmt->execute();
    $language_code = 'DK';
    $native_speakers = 5_222_444;
    $stmt->execute();


    $mysqli->autocommit(true);

    print     "Committed 2 row in the database\n";
    } catch (    mysqli_sql_exception $exception) {
    $mysqli->rollback();

    throw     $exception;
    }

    过程化风格

    <?php


    mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

    $mysqli = mysqli_connect("localhost", "my_user", "my_password", "world");


    mysqli_query($mysqli, "CREATE TABLE IF NOT EXISTS language (
    Code text NOT NULL,
    Speakers int(11) NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;"    );


    mysqli_autocommit($mysqli, false);

    $result = mysqli_query($mysqli, "SELECT @@autocommit");
    $row = mysqli_fetch_row($result);
    printf("Autocommit is %s\n", $row[0]);

    try {

    $stmt = mysqli_prepare($mysqli, 'INSERT INTO language(Code, Speakers) VALUES (?,?)');
    mysqli_stmt_bind_param($stmt, 'ss', $language_code, $native_speakers);


    $language_code = 'DE';
    $native_speakers = 50_123_456;
    mysqli_stmt_execute($stmt);
    $language_code = 'FR';
    $native_speakers = 40_546_321;
    mysqli_stmt_execute($stmt);


    mysqli_commit($mysqli);
    print     "Committed 2 rows in the database\n";

    $result = mysqli_query($mysqli, "SELECT @@autocommit");
    $row = mysqli_fetch_row($result);
    printf("Autocommit is %s\n", $row[0]);


    $language_code = 'PL';
    $native_speakers = 30_555_444;
    mysqli_stmt_execute($stmt);
    $language_code = 'DK';
    $native_speakers = 5_222_444;
    mysqli_stmt_execute($stmt);


    mysqli_autocommit($mysqli, true);

    print     "Committed 2 row in the database\n";
    } catch (    mysqli_sql_exception $exception) {
    mysqli_rollback($mysqli);

    throw     $exception;
    }

    以上示例会输出：

    Autocommit is 0 Committed 2 rows in the database Autocommit is 0 Committed 2 row in the database Autocommit is 0 Committed 2 rows in the database Autocommit is 0 Committed 2 row in the database

    注释

    注意:

    此方法在不支持事务的表类型中不生效，如 MyISAM 或 ISAM。

    参见

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