Online PHP editor | refs for KgLPn

@ 2013-06-18T18:49:08Z

<?php
class A {
    static private $_registry;
    public function __construct() {}
    public static function getInstance() {
        if(null === self::$_registry) {
            self::$_registry = new self;
        }
        return self::$_registry;
    }
}

var_dump(A::getInstance());