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<?php class Bar { private static $instance; protected $guessers = array(); public static function getInstance() { if (null === self::$instance) { self::$instance = new self(); } return self::$instance; } private function __construct() { $this->guessers[] = new stdClass(); } public function register($guesser) { $this->guessers[] = $guesser; } } class Foo extends Bar { public function __construct() { } } $class = new Foo(); $class->register(new stdClass());
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