<?php
$session = mysql_xdevapi\getSession("mysqlx://user:password@localhost");
$schema = $session->getSchema("addressbook");
$collection = $schema->createCollection("people");
$session->startTransaction();
$result = $collection
->find("age > 50")
->lockShared()
->execute();
// ... read the object in shared mode
// Complete the transaction and unlock the document
$session->commit();
?>