PHP Manual: Switch to shard

array mysqlnd_ms_fabric_select_shard ( mixed $connection , mixed $table_name , mixed $shard_key )

Warning

This function is currently not documented; only its argument list is available.

MySQL Fabric related.

Switch the connection to the shards responsible for the given table name and shard key.

connection: A MySQL connection handle obtained from any of the connect functions of the mysqli, mysql or PDO_MYSQL extensions.
table_name: The table name to ask Fabric about.
shard_key: The shard key to ask Fabric about.

FALSE on error. Otherwise, TRUE

Note:
mysqlnd_ms_fabric_select_shard requires PECL mysqlnd_ms >> 1.6.0.