--TEST-- Testing trait collisions --FILE-- <?php trait foo { public function test() { return 3; } } trait c { public function test() { return 2; } } trait b { public function test() { return 1; } } class bar { use foo, c, b; } $x = new bar; var_dump($x->test()); ?> --EXPECTF-- Fatal error: Trait method test has not been applied, because there are collisions with other trait methods on bar in %s on line %d