--TEST-- ReflectionClass::hasConstant --SKIPIF-- <?php extension_loaded('reflection') or die('skip'); ?> --FILE-- <?php class Foo { const c1 = 1; } $class = new ReflectionClass("Foo"); var_dump($class->hasConstant("c1")); var_dump($class->hasConstant("c2")); ?> --EXPECT-- bool(true) bool(false)