<?
    class Singleton
    {
        var $_info = null;
 
        function Singleton() {
            $this->_info = 'Original value';
        }
 
        function getInfo() {
            return $this->_info;
        }
 
        function setInfo($info) {
            $this->_info = $info;
        }
 
        function &getInstance() {
            static $instance = null;
 
            if (is_null($instance)) {
                $instance = new Singleton();
            }
            return $instance;
        }
    }
 
    $a = & Singleton::getInstance();
    $b = & Singleton::getInstance();
    $a->setInfo('Hi, my name is A');
    $b->setInfo('Hi, my name is B');
    echo $a->getInfo() . "\n";
    echo $b->getInfo() . "\n";
 
?>