--TEST-- Test constants with default values based on other constants. --FILE-- <?php class C { const CONST_2 = self::CONST_1; const CONST_1 = self::BASE_CONST; const BASE_CONST = 'hello'; } var_dump(C::CONST_1, C::CONST_2); ?> --EXPECTF-- string(5) "hello" string(5) "hello"