Chain Design Pattern in PHP

chain_design_pattern.php

<?php

abstract class HomeChecker {

    protected $succeesor;

    public abstract function check(HomeStatus $home);

    public function succeedWith(HomeChecker $succeesor){
        $this->succeesor = $succeesor;
    }
    public function next(HomeStatus $home){
        if ($this->succeesor){
            $this->succeesor->check($home);
        }
    }
}

class Locks extends HomeChecker {
    public function check(HomeStatus $home) {
        if (!$home->doorLocked){
            throw new Exception('Door is not locked! Abort abort!');
        }

        $this->next($home);
    }
}

class Alarm extends HomeChecker {

    public function check(HomeStatus $home) {
        if (!$home->lightsOn){
            throw new Exception('Lights is not off! Abort abort!');
        }

        $this->next($home);
    }
}
class Lights  extends HomeChecker {

    public function check(HomeStatus $home) {
        if (!$home->alarmOn){
            throw new Exception('Alarm is not on! Abort abort!');
        }

        $this->next($home);
    }
}

class HomeStatus {
    public $alarmOn = true;
    public $lightsOn = false;
    public $doorLocked = true;
}

$locks = new Locks;
$lights = new Lights;
$alarm = new Alarm;

$locks->succeedWith($lights);
$lights->succeedWith($alarm);

$locks->check(new HomeStatus);