{
}
interface iface
{
    function f1();
}
class ifaceImpl implements iface
{
    function f1()
    {
    }
}
abstract class abstractClass
{
    function f1()
    {
    }
    abstract function f2();
}
class D extends abstractClass
{
    function f2()
    {
    }
}
$classes = array("C", "ifaceImpl", "D");
foreach ($classes as $class) {
    $ro = new ReflectionObject(new $class());
    echo "Is {$class} instantiable?  ";
    var_dump($ro->IsInstantiable());
}