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<?php class Singleton { private static $instance = null; final private function __construct() {} final private function __clone() {} public static function getInstance() { if (!self::$instance) { self::$instance = new self; } return self::$instance; } } $oneInstance = Singleton::getInstance(); $reflection = new ReflectionClass('Singleton'); echo "Cloneable outside:", var_dump($reflection->isCloneable()); $cloner = function () { return clone $this; }; $secondInstance = clone $oneInstance; var_dump($oneInstance, $secondInstance);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Private methods cannot be final as they are never overridden by other classes in /in/b3eqi on line 8 Cloneable outside:bool(false) Fatal error: Uncaught Error: Call to private Singleton::__clone() from global scope in /in/b3eqi:27 Stack trace: #0 {main} thrown in /in/b3eqi on line 27
Process exited with code 255.

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