Turns on or off auto-committing database modifications

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- Turns on or off auto-committing database modifications

# mysqli::autocommit

# mysqli_autocommit

(PHP 5, PHP 7, PHP 8)

mysqli::autocommit -- mysqli_autocommit — Turns on or off auto-committing database modifications

### Description

Object-oriented style

public mysqli::autocommit(bool `$enable`): bool

Procedural style

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

Turns on or off auto-commit mode on queries for the database connection.

To determine the current state of autocommit use the SQL command `SELECT @@autocommit`.

### Parameters

`mysql`

  Procedural style only: A mysqli object returned by mysqli_connect() or mysqli_init()

`enable`

  Whether to turn on auto-commit or not.

### Return Values

Returns `true` on success or `false` on failure.

### Errors/Exceptions

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.

### Examples

Example #1 mysqli::autocommit() example

Object-oriented style

    <?php

    /* Tell mysqli to throw an exception if an error occurs */
    mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

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

    /* The table engine has to support transactions */
    $mysqli->query("CREATE TABLE IF NOT EXISTS language (
        Code text NOT NULL,
        Speakers int(11) NOT NULL
        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");

    /* Turn autocommit off */
    $mysqli->autocommit(false);

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

    try {
        /* Prepare insert statement */
        $stmt = $mysqli->prepare('INSERT INTO language(Code, Speakers) VALUES (?,?)');
        $stmt->bind_param('ss', $language_code, $native_speakers);

        /* Insert some values */
        $language_code = 'DE';
        $native_speakers = 50_123_456;
        $stmt->execute();
        $language_code = 'FR';
        $native_speakers = 40_546_321;
        $stmt->execute();

        /* Commit the data in the database. This doesn't set autocommit=true */
        $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]);

        /* Try to insert more values */
        $language_code = 'PL';
        $native_speakers = 30_555_444;
        $stmt->execute();
        $language_code = 'DK';
        $native_speakers = 5_222_444;
        $stmt->execute();

        /* Setting autocommit=true will trigger a commit */
        $mysqli->autocommit(true);

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

        throw $exception;
    }

Procedural style

    <?php

    /* Tell mysqli to throw an exception if an error occurs */
    mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

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

    /* The table engine has to support transactions */
    mysqli_query($mysqli, "CREATE TABLE IF NOT EXISTS language (
        Code text NOT NULL,
        Speakers int(11) NOT NULL
        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");

    /* Turn autocommit off */
    mysqli_autocommit($mysqli, false);

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

    try {
        /* Prepare insert statement */
        $stmt = mysqli_prepare($mysqli, 'INSERT INTO language(Code, Speakers) VALUES (?,?)');
        mysqli_stmt_bind_param($stmt, 'ss', $language_code, $native_speakers);

        /* Insert some values */
        $language_code = 'DE';
        $native_speakers = 50_123_456;
        mysqli_stmt_execute($stmt);
        $language_code = 'FR';
        $native_speakers = 40_546_321;
        mysqli_stmt_execute($stmt);

        /* Commit the data in the database. This doesn't set autocommit=true */
        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]);

        /* Try to insert more values */
        $language_code = 'PL';
        $native_speakers = 30_555_444;
        mysqli_stmt_execute($stmt);
        $language_code = 'DK';
        $native_speakers = 5_222_444;
        mysqli_stmt_execute($stmt);

        /* Setting autocommit=true will trigger a commit */
        mysqli_autocommit($mysqli, true);

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

        throw $exception;
    }

The above examples will output:

    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

### Notes

> Note:

> This function does not work with non transactional table types (like MyISAM or ISAM).

### See Also

- mysqli_begin_transaction() - Starts a transaction
- mysqli_commit() - Commits the current transaction
- mysqli_rollback() - Rolls back current transaction