Description:
------------
Every class method can be called as static:
A wrote a class without static method, but i can call any method as static method.

Reproduce code:
---------------
<?php
class Test {

    public function nonStatic() {
        echo 'Hola Non-Static';
    }
}

Test::nonStatic();
?>

Expected result:
----------------
a error message or exception

Actual result:
--------------
Hola Non-Static