void User:exAskedByCountry(Country)

class User

{

	private $alcoholDrinkAllower;



	/// or "setAlcoholDrinkAllower", but if "set" bothers you, name it another way

	public function useAlcoholDrinkAllower(IAllower $allower) {

		if (mt_rand(0, 100) < 50)

			$this->alcoholDrinkAllower = $allower;

		else

			echo "I just don't want to use that allower.";

	}



	public function drinkAlcohol() {

		if ($this->alcoholDrinkAllower === null)

			echo "I drink a beer (without any acknowledgement)";

		else if ($this->alcoholDrinkAllower->isAllowed())

			echo "I drink a beer";

	}



	/// Same: you can call it "getAge()" if you want to

	public function askAge() {

		return $this->age;

	}

}





class UserDrinkAllower implements IAllower {

	private $user;

	private $country;

	private $beerQuality = 8;



	public function isAllowed() {

		return ($user->askAge() >= $country->askMajority() && $beerQuality > 5);

	}

}





class Country

{

	/// It's somehow the same as a getter, it's just a matter of naming

	public function askMajority() {

		return (int)file_get_contents("country.majority.txt");

	}

} 

/**

 * @return int Age

*/

public function getAge() { ... }

public function isAllowed() {

	$age = (int)$user->getAge();

	// Not sure what happens if return is "null" or not castable

}

...

public function getAge() { ... }

public function isAllowed() {

	// Forces us to create an Integer class (typehinting is only allowed for classes)

	$age = new Integer(0);

	$user->getAge($age);

}

...

public function getAge(Integer &$ageContainer) {

	$ageContainer->setValue($this->age);

	// We can call it "set" if spec says "Integer assures that getValue will return what setValue was"

}

Citation :"15" == 15 → true
"15" === 15 → false
15 == "15 years" → true
"15 years" == 15 → true
"15 years" === 15 → false
"x15 years" === 15 → false
" 15 years" === 15 → false
(int)"15 years" == 15 → true
(int)"15 years" === 15 → true
is_int("15 years") → false

is_integer($value)