Description:
------------
see test script from https://wiki.php.net/rfc/named_params

It does not throw.

In addition, I think, any parameter name reused on different position should throw.

Test script:
---------------
interface I {
    public function test($foo, $bar);
}
 
class C implements I {
    public function test($bar, $foo) {}
}
 
// Fatal error: Parameter $foo of C::test() at position #2 conflicts with
//              parameter $foo of I::test() at position #1

Expected result:
----------------
catchable error

Actual result:
--------------
no error