Online PHP editor | refs for kNWY3

<?php namespace Concrete\Test { use DerpFoo; class Test { public function __construct(Concrete\Foo\FooInterface $foo) {} } $f = new Test(new \Concrete\BetterFoo\BetterFoo); } namespace Concrete\Foo { class Foo implements FooInterface { public function Derp() {} } interface FooInterface { public function Derp(); } class_alias('\Concrete\Foo\Foo', 'DerpFoo'); } namespace Concrete\BetterFoo { use \Concrete\Foo\FooInterface; use \Concrete\Foo\Foo; class BetterFoo extends Foo implements FooInterface {} }