Paste Description for suv4x4
Solution for extensible singleton
- suv4x4
- Wednesday, June 28th, 2006 at 2:44:03am MDT
- class Super
- {
- function Func()
- {
- echo "Super Func<br>";
- $this->Func2();
- }
- function Func2()
- {
- echo "Super Func 2<br>";
- }
- // singleton
- static private $instances = array(); // assoc array with one single instance for every class
- static protected function getInstance($c=__CLASS__) // overload in subclasses (as public)
- {
- if(is_null(self::$instance[$c])) {
- self::$instance[$c] = new $c();
- }
- return self::$instance[$c];
- }
- }
- class Sub extends Super
- {
- function Func()
- {
- echo "Sub Func<br>";
- parent::Func();
- }
- static public function getInstance($c=__CLASS__)
- {
- return parent::getInstance($c);
- }
- function Func2()
- {
- echo "Sub Func 2<br>";
- parent::Func2();
- }
- }
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