mysqli::begin_transaction

mysqli_begin_transaction

(PHP 5 >= 5.5.0, PHP 7, PHP 8)

mysqli::begin_transaction -- mysqli_begin_transactionStarts a transaction

Descrizione

Stile orientato agli oggetti

public mysqli::begin_transaction(int $flags = 0, ?string $name = null): bool

Stile procedurale:

mysqli_begin_transaction(mysqli $mysql, int $flags = 0, ?string $name = null): 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:

name

Savepoint name for the transaction.

Valori restituiti

Restituisce true in caso di successo, false in caso di fallimento.

Log delle modifiche

Versione Descrizione
8.0.0 name is now nullable.

Esempi

Example #1 mysqli::begin_transaction() example

Stile orientato agli oggetti

<?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;"
);

/* Start transaction */
$mysqli->begin_transaction();

try {
/* Insert some values */
$mysqli->query("INSERT INTO language(Code, Speakers) VALUES ('DE', 42000123)");

/* Try to insert invalid values */
$language_code = 'FR';
$native_speakers = 'Unknown';
$stmt = $mysqli->prepare('INSERT INTO language(Code, Speakers) VALUES (?,?)');
$stmt->bind_param('ss', $language_code, $native_speakers);
$stmt->execute();

/* If code reaches this point without errors then commit the data in the database */
$mysqli->commit();
} catch (
mysqli_sql_exception $exception) {
$mysqli->rollback();

throw
$exception;
}

Stile procedurale

<?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;"
);

/* Start transaction */
mysqli_begin_transaction($mysqli);

try {
/* Insert some values */
mysqli_query($mysqli, "INSERT INTO language(Code, Speakers) VALUES ('DE', 42000123)");

/* Try to insert invalid values */
$language_code = 'FR';
$native_speakers = 'Unknown';
$stmt = mysqli_prepare($mysqli, 'INSERT INTO language(Code, Speakers) VALUES (?,?)');
mysqli_stmt_bind_param($stmt, 'ss', $language_code, $native_speakers);
mysqli_stmt_execute($stmt);

/* If code reaches this point without errors then commit the data in the database */
mysqli_commit($mysqli);
} catch (
mysqli_sql_exception $exception) {
mysqli_rollback($mysqli);

throw
$exception;
}

Note

Nota:

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

Vedere anche: