note 90090 added to language.oop5.patterns

Exemple of singleton that can be used for other class (need phpversion >= 5.3) <?php class SingletonModel { /** * Instance of singleton's class * * @var array */ private static $_instance; /** * All constructeur should be protected */ protected function __construct(){} /** * Singleton method to load a new object * * @return HlPwd_SingletonModel */ public static function singleton() { if (!isset(self::$instance[ get_called_class() ])) { $c = get_called_class(); self::$instance = new $c; } return self::$instance; } /** * Destroy the singleton */ public function destroySingleton() { unset(self::$_instance[ get_class($this) ]); } /** * Destructeur */ public function __destruct() { unset(self::$_instance); } /** * Impeach the clone of singleton */ public function __clone() { trigger_error('Cloning not allowed on a singleton object', E_USER_ERROR); } } # EOF you can easyli use it like that class mySingChild extends SingletonModel { protected function __construct() { //do important things } public function foo() { echo 'hello world'; } } $t = mySingChild::singleton(); $t->foo(); ---- Server IP: 195.207.10.20 Probable Submitter: 83.134.209.76 ---- Manual Page -- http://www.php.net/manual/en/language.oop5.patterns.php Edit -- https://master.php.net/note/edit/90090 Del: integrated -- https://master.php.net/note/delete/90090/integrated Del: useless -- https://master.php.net/note/delete/90090/useless Del: bad code -- https://master.php.net/note/delete/90090/bad+code Del: spam -- https://master.php.net/note/delete/90090/spam Del: non-english -- https://master.php.net/note/delete/90090/non-english Del: in docs -- https://master.php.net/note/delete/90090/in+docs Del: other reasons-- https://master.php.net/note/delete/90090 Reject -- https://master.php.net/note/reject/90090 Search -- https://master.php.net/manage/user-notes.php