Online PHP editor | refs for 16GIC

<?php trait singleton { /** * private construct, generally defined by using class */ //private function __construct() {} public static function getInstance() { static $_instance = NULL; $class = __CLASS__; return $_instance ?: $_instance = new $class; } public function __clone() { trigger_error('Cloning '.__CLASS__.' is not allowed.',E_USER_ERROR); } public function __wakeup() { trigger_error('Unserializing '.__CLASS__.' is not allowed.',E_USER_ERROR); } } /** * Example Usage */ class foo { use singleton; private function __construct() { $this->name = 'foo'; } } class bar { use singleton; private function __construct() { $this->name = 'bar'; } } $foo = foo::getInstance(); echo $foo->name; $bar = bar::getInstance(); echo $bar->name;