mysqlnd_ms_get_last_gtid(3) [php man page]
MYSQLND_MS_GET_LAST_GTID(3) 1 MYSQLND_MS_GET_LAST_GTID(3) mysqlnd_ms_get_last_gtid - Returns the latest global transaction ID SYNOPSIS
string mysqlnd_ms_get_last_gtid (mixed $connection) DESCRIPTION
Returns a global transaction identifier which belongs to a write operation no older than the last write performed by the client. It is not guaranteed that the global transaction identifier is identical to that one created for the last write transaction performed by the client. PARAMETERS
o $connection - A PECL/mysqlnd_ms connection handle to a MySQL server of the type PDO_MYSQL, mysqli> or ext/mysql. The connection handle is obtained when opening a connection with a host name that matches a mysqlnd_ms configuration file entry using any of the above three MySQL driver extensions. RETURN VALUES
Returns a global transaction ID (GTID) on success. Otherwise, returns FALSE. The function mysqlnd_ms_get_last_gtid(3) returns the GTID obtained when executing the SQL statement from the fetch_last_gtid entry of the global_transaction_id_injection section from the plugins configuration file. The function may be called after the GTID has been incremented. NOTES
Note mysqlnd_ms_get_last_gtid(3) requires PHP >= 5.4.0 and PECL mysqlnd_ms >= 1.2.0. Internally, it is using a mysqlnd library C func- tionality not available with PHP 5.3. Please note, all MySQL 5.6 production versions do not provide clients with enough information to use GTIDs for enforcing session consistency. In the worst case, the plugin will choose the master only. EXAMPLES
Example #1 mysqlnd_ms_get_last_gtid(3) example <?php /* Open mysqlnd_ms connection using mysqli, PDO_MySQL or mysql extension */ $mysqli = new mysqli("myapp", "username", "password", "database"); if (!$mysqli) /* Of course, your error handling is nicer... */ die(sprintf("[%d] %s ", mysqli_connect_errno(), mysqli_connect_error())); /* auto commit mode, transaction on master, GTID must be incremented */ if (!$mysqli->query("DROP TABLE IF EXISTS test")) die(sprintf("[%d] %s ", $mysqli->errno, $mysqli->error)); printf("GTID after transaction %s ", mysqlnd_ms_get_last_gtid($mysqli)); /* auto commit mode, transaction on master, GTID must be incremented */ if (!$mysqli->query("CREATE TABLE test(id INT)")) die(sprintf("[%d] %s ", $mysqli->errno, $mysqli->error)); printf("GTID after transaction %s ", mysqlnd_ms_get_last_gtid($mysqli)); ?> SEE ALSO
Global Transaction IDs. PHP Documentation Group MYSQLND_MS_GET_LAST_GTID(3)
Check Out this Related Man Page
MYSQLI_ROLLBACK(3) 1 MYSQLI_ROLLBACK(3) mysqli::rollback - Rolls back current transaction Object oriented style SYNOPSIS
bool mysqli::rollback ([int $flags], [string $name]) DESCRIPTION
Procedural style bool mysqli_rollback (mysqli $link, [int $flags], [string $name]) Rollbacks the current transaction for the database. PARAMETERS
o $ link -Procedural style only: A link identifier returned by mysqli_connect(3) or mysqli_init(3) o $flags - A bitmask of MYSQLI_TRANS_COR_* constants. o $name - If provided then ROLLBACK/*name*/ is executed. RETURN VALUES
Returns TRUE on success or FALSE on failure. CHANGELOG
+--------+-------------------------------------+ |Version | | | | | | | Description | | | | +--------+-------------------------------------+ | 5.5.0 | | | | | | | Added $flags and $name parameters. | | | | +--------+-------------------------------------+ EXAMPLES
Example #1 mysqli::rollback example Object oriented style <?php $mysqli = new mysqli("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s ", mysqli_connect_error()); exit(); } /* disable autocommit */ $mysqli->autocommit(FALSE); $mysqli->query("CREATE TABLE myCity LIKE City"); $mysqli->query("ALTER TABLE myCity Type=InnoDB"); $mysqli->query("INSERT INTO myCity SELECT * FROM City LIMIT 50"); /* commit insert */ $mysqli->commit(); /* delete all rows */ $mysqli->query("DELETE FROM myCity"); if ($result = $mysqli->query("SELECT COUNT(*) FROM myCity")) { $row = $result->fetch_row(); printf("%d rows in table myCity. ", $row[0]); /* Free result */ $result->close(); } /* Rollback */ $mysqli->rollback(); if ($result = $mysqli->query("SELECT COUNT(*) FROM myCity")) { $row = $result->fetch_row(); printf("%d rows in table myCity (after rollback). ", $row[0]); /* Free result */ $result->close(); } /* Drop table myCity */ $mysqli->query("DROP TABLE myCity"); $mysqli->close(); ?> Procedural style <?php $link = mysqli_connect("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s ", mysqli_connect_error()); exit(); } /* disable autocommit */ mysqli_autocommit($link, FALSE); mysqli_query($link, "CREATE TABLE myCity LIKE City"); mysqli_query($link, "ALTER TABLE myCity Type=InnoDB"); mysqli_query($link, "INSERT INTO myCity SELECT * FROM City LIMIT 50"); /* commit insert */ mysqli_commit($link); /* delete all rows */ mysqli_query($link, "DELETE FROM myCity"); if ($result = mysqli_query($link, "SELECT COUNT(*) FROM myCity")) { $row = mysqli_fetch_row($result); printf("%d rows in table myCity. ", $row[0]); /* Free result */ mysqli_free_result($result); } /* Rollback */ mysqli_rollback($link); if ($result = mysqli_query($link, "SELECT COUNT(*) FROM myCity")) { $row = mysqli_fetch_row($result); printf("%d rows in table myCity (after rollback). ", $row[0]); /* Free result */ mysqli_free_result($result); } /* Drop table myCity */ mysqli_query($link, "DROP TABLE myCity"); mysqli_close($link); ?> The above examples will output: 0 rows in table myCity. 50 rows in table myCity (after rollback). SEE ALSO
mysqli_begin_transaction(3), mysqli_commit(3), mysqli_autocommit(3), mysqli_release_savepoint(3). PHP Documentation Group MYSQLI_ROLLBACK(3)