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    mysqli::begin_transaction

    mysqli_begin_transaction

    (PHP 5 >= 5.5.0, PHP 7)

    mysqli::begin_transaction -- mysqli_begin_transaction — Starts a transaction

    Descrizione

    Stile orientato agli oggetti

    public mysqli::begin_transaction ([ int $flags = 0 [, string $name ]] ) : bool

    Stile procedurale:

    mysqli_begin_transaction ( mysqli $link [, int $flags = 0 [, string $name ]] ) : bool

    Begins a transaction. Requires the InnoDB engine (it is enabled by default). For additional details about how MySQL transactions work, see » http://dev.mysql.com/doc/mysql/en/commit.html.

    Elenco dei parametri

    link

    Solo nello stile procedurale: un identificatore restituito da mysqli_connect() o mysqli_init()

    flags

    Valid flags are:

    • MYSQLI_TRANS_START_READ_ONLY: Start the transaction as "START TRANSACTION READ ONLY". Requires MySQL 5.6 and above.

    • MYSQLI_TRANS_START_READ_WRITE: Start the transaction as "START TRANSACTION READ WRITE". Requires MySQL 5.6 and above.

    • MYSQLI_TRANS_START_WITH_CONSISTENT_SNAPSHOT: Start the transaction as "START TRANSACTION WITH CONSISTENT SNAPSHOT".

    name

    Savepoint name for the transaction.

    Valori restituiti

    Restituisce TRUE in caso di successo, FALSE in caso di fallimento.

    Esempi

    Example #1 $mysqli->begin_transaction() example

    Stile orientato agli oggetti

    <?php
    $mysqli     = new mysqli("127.0.0.1", "my_user", "my_password", "sakila");

    if (    $mysqli->connect_errno) {
            printf("Connect failed: %s\n", $mysqli->connect_error);
        exit();
    }

    $mysqli->begin_transaction(MYSQLI_TRANS_START_READ_ONLY);

    $mysqli->query("SELECT first_name, last_name FROM actor");
    $mysqli->commit();

    $mysqli->close();
    ?>

    Stile procedurale

    <?php
    $link     = mysqli_connect("127.0.0.1", "my_user", "my_password", "sakila");

    if (    mysqli_connect_errno()) {
            printf("Connect failed: %s\n", mysqli_connect_error());
        exit();
    }

    mysqli_begin_transaction($link, MYSQLI_TRANS_START_READ_ONLY);

    mysqli_query($link, "SELECT first_name, last_name FROM actor LIMIT 1");
    mysqli_commit($link);

    mysqli_close($link);
    ?>

    Vedere anche:

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    User Contributed Notes 3 notes

    up
    2
    Luc
    3 years ago
    For PHP<5.5:

        mysqli_query($db, "START TRANSACTION");
    up
    1
    Ral
    2 years ago
    If you receive errors like: "This server version doesn't support 'READ WRITE' and 'READ ONLY'. Minimum 5.6.5 is required" with versions of MariaDB that DO support them, this is due to an internal check in mysqli conflicting with a hack in MariaDB to allow replication with oracle mysql.

    MariaDB prefixes its server version numbers with "5.5.5-" for example "5.5.5-10.3.7-MariaDB-1:10.3.7+maria~stretch". This is because oracle mysql would interpet the "10" as version 1. Mysql clients aware of MariaDB have been updated to detect and strip this prefix.

    However the check for mysqli.begin-transaction sees the 5.5.5 prefix and so fails.

    The workaround is to specify a custom version string without the prefix for MariaDB on the command line using the --version option. Then mysqli.begin-transaction functions as expected.
    up
    -1
    VasK@hapir
    1 year ago
    The above answer from Ral worked for us, Thanks a lot. This is how we implemented the proposed workaround for

    Warning: mysqli_begin_transaction(): This server version doesn't support 'READ WRITE' and 'READ ONLY'. Minimum 5.6.5 is required

    We appended the following line to /etc/my.cnf and restarted MySQL server

    version=10.2.19-MariaDB
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