检查同一个类中是否存在多个方法？

Question

Is there a way to verify if multiple methods exists in same class?

class A{
    function method_a(){}
    function method_b(){}
}

if ( (int)method_exists(new A(), 'a', 'b') ){
    echo "Method a & b exist";
}

Answer 1

I'd probably have used interface here:

interface Foo {
  function a();
  function b();
}

... then, in the client code:

if (A instanceof Foo) {
   // it just has to have both a() and b() implemented
}

I think this more clearly shows your real intent then just checking for methods' existence.