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<?php
declare(strict_types=1);
/**
* @author : Jagepard <[email protected]>
* @license https://mit-license.org/ MIT
*/
namespace Behavioral\Observer;
class FootballSubject implements SubjectInterface
{
use NameTrait;
private array $observers = [];
public function attachObserver(ObserverInterface $observer): void
if (array_key_exists($observer->getName(), $this->observers)) {
throw new \InvalidArgumentException("Observer is already exist");
}
$this->observers[$observer->getName()] = $observer;
public function detachObserver(string $name): void
if (!array_key_exists($name, $this->observers)) {
throw new \InvalidArgumentException("Observer is not exist");
unset($this->observers[$name]);
public function notifyObservers(EventInterface $event): void
foreach ($this->observers as $observer) {
printf(
"%s has get information about: %s %s \n",
$observer->getName(),
$this->name,
$event->getName()
);
Jagepard /
PhpDesignPatterns-Observer
