Type hint. Returns not what is expected. Where is the mistake?

Question

MySQL

In the example: echo foo($object, "func"); should return - MyClass::func, but returns MyClass::__invoke.
Thank you.

class MyClass{
  function func(){
    return __METHOD__;
  }
  static function staticMethod(){
    return __METHOD__;
  }
  function __invoke(){
    return __METHOD__;
  }
}
$object = new MyClass();

function foo(callable $x){
  return $x();
}

echo foo($object, "func"); // MyClass::func (возвращает MyClass::__invoke)
echo foo(["MyClass", "staticMethod"]); // MyClass::staticMethod
echo foo($object); // MyClass::__invoke

Answer 1

Having limits the already prepared data selection. Yours doesn't have a table_schema column.
Change to where.

Answer 2

echo foo([$object, "func"]); // MyClass::func

Answer 3

$object contains __invoke , which means it is callable . The foo function just calls it.
We get: Same as:
$object(); // Вызов метода __invoke