Php, how to determine if a class (and not taking account subclasses!) has a method?

I know theres a method_exists() but it says true even when that method is inherited.

class A
 {
  public function eix()
  {
  }
 }
 
 class B extends A
 {
 }
 

echo method_exists ('B', 'eix');

so its true, but B class doesnt have it. How to dodge this?

---