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.

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