PHP - Access modifiers - 2

class Person
{

 public function pub()
 {
  echo 'I am Publicly accessible<br>';
 }

 private function pri()
 {
  echo 'I am Private function<br>';
 }

 protected function pro()
 {
  echo 'I am Protected function<br>';
 }
}

$person = new Person;



$person->pub();  // output is I am Publicly accessible

$person->pri();  // Fatal error: Call to private method Person::pri()

$person->pro();  // Fatal error: Call to protected method Person::pro()