1--TEST-- 2Bug #53727 (Inconsistent behavior of is_subclass_of with interfaces) 3--FILE-- 4<?php 5interface MyInterface { 6 const TEST_CONSTANT = true; 7} 8 9class ParentClass implements MyInterface { } 10 11class ChildClass extends ParentClass { } 12 13echo (is_subclass_of('ChildClass', 'MyInterface') ? 'true' : 'false') . "\n"; 14echo (defined('ChildClass::TEST_CONSTANT') ? 'true' : 'false') . "\n"; 15 16echo (is_subclass_of('ParentClass', 'MyInterface') ? 'true' : 'false') . "\n"; 17echo (defined('ParentClass::TEST_CONSTANT') ? 'true' : 'false') . "\n"; 18--EXPECT-- 19true 20true 21true 22true 23
