- var_dump: documentation ( source)
- is_a: documentation ( source)
- is_subclass_of: documentation ( source)
<?php
class Foo {}
class Bar extends Foo {}
var_dump(is_subclass_of(Bar::class, Foo::class));
var_dump(is_a(Foo::class, Foo::class));
var_dump(is_a(Foo::class, Bar::class));