Description Sylvia Tancheva 2010-05-03 11:07:32 EDT

File x.php:
<?php
class Singleton {
    
    protected static $_instance;
    
    private function __construct() # we don't permit an explicit call of the constructor! (like $v = new Singleton())
{
    }
    
    private function __clone() # we don't permit cloning the singleton (like $x = clone $v)
{
    }
    
    public static function getInstance() {
        if (self::$_instance === NULL) {
            self::$_instance = new self ();
        }
        return self::$_instance;
    }
    
    function sayHello() {
        echo 'Hello';
    }
}


File y.php:
<?php
include_once 'x.php';
$instance = Singleton::getInstance();
$instance->| // <-- No CA here