- class_implements: documentation ( source)
- var_dump: documentation ( source)
- in_array: documentation ( source)
<?php
interface A {}
class B implements A {}
class C {}
var_dump(in_array(A::class, class_implements(A::class)));
var_dump(in_array(A::class, class_implements(B::class)));
var_dump(in_array(A::class, class_implements(C::class)));