Online PHP editor | output for 5FMep

<?php class Musket { private static $instanciated = false; private $var; public function __construct() { if (self::$instanciated === true) { throw new RuntimeException('Could not instanciate class'); } self::$instanciated = true; } // Interdiction du clonage private function __clone() { } public function get(): int { return $this->var; } public function set(int $value) { $this->var = $value; } } class Factory { private $instance = null; public function getInstance() { if ($this->instance === null) { $this->instance = new Musket(); } return $this->instance; } } $factory = new Factory(); $o = $factory->getInstance(); $o->set(5); $factory2 = new Factory(); // Génère une exception "Could not instanciate class" $o2 = $factory2->getInstance();