Online PHP editor | refs for r3fid

<?php interface SerializableInterface {}; interface SomeResizableInterface {}; interface IterableInterface {}; trait SomeSerializableTrait {}; trait SomeOtherSerializableTrait {}; class SomeContainer implements SerializableInterface, IterableInterface { use SomeSerializableTrait; } class SomeOtherContainer extends SomeContainer implements SomeResizableInterface { use SomeOtherSerializableTrait; } $someContainer = new SomeContainer; $someOtherContainer = new SomeOtherContainer; var_dump($someContainer instanceof SerializableInterface); var_dump($someOtherContainer instanceof SerializableInterface); var_dump($someOtherContainer instanceof SomeSerializableTrait); var_dump($someOtherContainer instanceof SomeOtherSerializableTrait); // type hint it function testTrait(SomeSerializableTrait $container) {} function testOtherTrait(SomeOtherSerializableTrait $container) {} function testInterface(SomeResizableInterface $container) {} testInterface($someOtherContainer); testOtherTrait($someOtherContainer); testTrait($someOtherContainer);