Online PHP editor | refs for ZQgJG

<?php interface I { } class A implements I { } class B extends A { } $b = new B(); echo "B <-> I:\n"; var_dump($b instanceof I); var_dump(is_a($b, "I")); var_dump(is_subclass_of($b, "I")); $rc = new ReflectionClass("B"); var_dump($rc->getInterfaceNames()); echo "\n\nB <-> A:\n"; var_dump($b instanceof A); var_dump(is_a($b, "A")); var_dump(is_subclass_of($b, "A"));