- var_dump: documentation ( source)
<?php
$x = new __PHP_Incomplete_Class();
var_dump(is_object($x));
class Foo extends __PHP_Incomplete_Class { }
$y = new Foo();
var_dump(is_object($y));
class Bar extends stdClass { }
$z = new Bar();
var_dump(is_object($z));
var_dump($x instanceof stdClass);
var_dump($y instanceof stdClass);
var_dump($z instanceof stdClass);