Description:
------------
When trying to enforce arguments on constructors, PHP behaves unexpectedly. If you define the constructor as an abstract method in a parent level class, the __construct method argument datatype/count checks go out the window in children. This issue is the same whether its in an interface or abstract class.

Reproduce code:
---------------
class ExampleClass {}

interface TestInterface {
	public function __construct(ExampleClass $var);
}

class Test implements TestInterface {
	public function __construct() {} // NO ERROR (unexpected)
}



Expected result:
----------------
Should produce an error

Actual result:
--------------
No error is reported.