Description:
------------
---
From manual page:
http://www.php.net/language.oop5.interfaces
http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.class.class
---


Test script:
---------------
<?php
namespace Foo;

interface Bar
{

}

class SomeClass implements Bar
{

}

Expected result:
----------------
<?php
use Foo\Bar;
use Foo\SomeClass;

if(isset(class_implements(SomeClass::class)[Bar::interface]))) {
    echo 'Yupee!';
} else {
    echo 'Ugh :(';
}
?>

Expected output:
Yupee!

Actual result:
--------------
Undefined constant