问禁止PHP子类中的方法和关键字

EN

{
  // Parent constructor
  public function __construct ()
  {
     if (strtolower(get_class($this)) != 'aroot') {
        $allowed_publics = ['__construct', '__invoke', 'respond'];
        $exst_methods = get_class_methods($this);

        if (!in_array('__invoke', $exst_methods)) {
            echo "__invoke method is missing.\n";
        }
        if (!in_array('respond', $exst_methods)) {
            echo "respond method is missing.\n";
        }
        foreach ($exst_methods as $method_name) {
            if (!in_array($method_name, $allowed_publics)) {
                echo "Not allowed public method $method_name \n";
            }
        }
    }

    //  check private method names
    if (method_exists($this, 'prohib_prv')) {
        echo "Method prohib_prv should not exist.\n";
    }
  }
}


class Bbranch extends Aroot 
{

  public function prohib() 
  {
  }

  private function prohib_prv() 
  {
  }

  protected function prohib_prt() 
  {
  }
}

$bbranch_obj = new Bbranch;  
$aroot = new Aroot;