note 93677 added to language.oop5.patterns

The Singleton class version wich is useable by only extending it : you would use is for example like this : class Users extends Singleton { ... public function SomeMethod() { } } and in your code : ... Users::inst()->SomeMethod(); ... I didn't check for performance, but here is the code : class Singleton { // Hold an instance of the class private static $instances = array(); // A private constructor; prevents direct creation of object final private function __construct() { } // Prevent users to clone the instance final public function __clone() { trigger_error( 'Clone is not allowed.', E_USER_ERROR ); } // The singleton method final public static function inst() { $c = get_called_class(); if( ! isset( self::$instances[$c] ) ) { self::$instances[$c] = new $c; } return self::$instances[$c]; } } ---- Server IP: 89.31.146.176 Probable Submitter: 92.143.11.74 ---- Manual Page -- http://www.php.net/manual/en/language.oop5.patterns.php Edit -- https://master.php.net/note/edit/93677 Del: integrated -- https://master.php.net/note/delete/93677/integrated Del: useless -- https://master.php.net/note/delete/93677/useless Del: bad code -- https://master.php.net/note/delete/93677/bad+code Del: spam -- https://master.php.net/note/delete/93677/spam Del: non-english -- https://master.php.net/note/delete/93677/non-english Del: in docs -- https://master.php.net/note/delete/93677/in+docs Del: other reasons-- https://master.php.net/note/delete/93677 Reject -- https://master.php.net/note/reject/93677 Search -- https://master.php.net/manage/user-notes.php