1--TEST-- 2Make sure trait does not implement an interface. 3--FILE-- 4<?php 5error_reporting(E_ALL); 6 7interface MyInterface { 8 public function a(); 9} 10 11trait THello implements MyInterface { 12 public function a() { 13 echo 'A'; 14 } 15} 16 17?> 18--EXPECTF-- 19Fatal error: Cannot use 'MyInterface' as interface on 'THello' since it is a Trait in %s on line %d