mysqli::begin_transaction

mysqli_begin_transaction

(PHP 5 >= 5.5.0, PHP 7)

mysqli::begin_transaction -- mysqli_begin_transaction — Starts a transaction

Description

Object oriented style

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

Procedural style:

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.

Parameters

link: Procedural style only: A link identifier returned by mysqli_connect() or 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.

Return Values

Returns TRUE on success or FALSE on failure.

Notes

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

Examples

Example #1 mysqli::begin_transaction() 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;");/* 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;}

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;");/* 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;}

Php/docs/mysqli.begin-transaction

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