Examples/test-suite/php/callback_runme.php

<?php

require "tests.php";
require "callback.php";
// In 2.0.6 and earlier, the constant was misnamed.
if (gettype(callback::FOO_I_Cb_Ptr) !== 'resource') die("callback::FOO_I_Cb_Ptr not a resource\n");

check::done();