Денис Скрипниченко (программист)

class Skripnichenko
{
	function __construct()
	{
	}
	// ...
}

class Profession
{
	const STUDENT = 'student';
	// ...
}

class Language
{
	const PHP = 'PHP';
	const OBJECTIVE_C = 'Objective C';
	// ...
}


class Denis extends Skripnichenko
{
	private $age = 0;
	private $hobbies = [];
	private $programmingLanguages = [];
	private $profession = null;
	private $name = null;

	function __construct()
	{
		parent::__construct();
		$this->age = 20;
		$this->name = 'Denis Skripnichenko';
		$this->profession = Profession::STUDENT;
		$this->programmingLanguages = [Language::PHP, Language::OBJECTIVE_C];
		$this->hobbies = ['programming', 'reading', 'gym'];
	}

	public function aboutMe()
	{
		return sprintf(
			'Hi! My name is %s, I’m %d years old and I am a %s. I like %s. My favorite programming languages are %s.',
			$this->name,
			$this->age,
			$this->profession,
			implode(', ', $this->hobbies),
			implode(', ', $this->programmingLanguages)
		);
	}

}

$denis = new Denis();
echo $denis->aboutMe();

exit;