mysqli::begin_transaction
mysqli_begin_transaction
(PHP 5 >= 5.5.0, PHP 7, PHP 8)
mysqli::begin_transaction -- mysqli_begin_transaction — Starts a transaction
Beschreibung
Objektorientierter Stil
$flags = 0, ?string $name = null): boolProzeduraler Stil:
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.
Parameter-Liste
-
mysql -
Nur bei prozeduralem Aufruf: Ein von mysqli_connect() oder mysqli_init() zurückgegebenes mysqli-Objekt.
-
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.
Rückgabewerte
Gibt bei Erfolg true zurück. Bei einem Fehler wird false zurückgegeben.
Changelog
| Version | Beschreibung |
|---|---|
| 8.0.0 |
name is now nullable.
|
Beispiele
Beispiel #1 mysqli::begin_transaction() example
Objektorientierter Stil
<?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;
}
Prozeduraler Stil
<?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;
}
Anmerkungen
Hinweis:
This function does not work with non transactional table types (like MyISAM or ISAM).
Siehe auch
- mysqli_autocommit() - Aktiviert oder deaktiviert das automatische Übertragen von Datenbankänderungen
- mysqli_commit() - Commits the current transaction
- mysqli_rollback() - Rolls back current transaction
