Description:
------------
Instantiating an object from a class with *required* parameters does not cease instantiation. In my humble opinion, as we have the ability to use optional parameters, missing required parameters should generate E_FATAL error.

Reproduce code:
---------------
class Foo
{
    public function __construct ($bar)
    {}
    public function doSomething()
    {}
}

$foo = new Foo(); // E_WARNING
$foo->doSomething(); // this will still execute.

Expected result:
----------------
class Foo
{
    public function __construct ($bar)
    {}
    public function doSomething()
    {}
}

$foo = new Foo(); // E_FATAL
$foo->doSomething(); // this will not execute.