单粒子失败。在include\u中初始化另一个对象一次(somescript.php)

require once 当这些脚本运行并实现Class方法时 get_shared_instance 一个新的单例启动。为什么会这样?你的工作是什么?

单亲(基本形式):

class Controller {

    protected static $shared_instance;

    public static function get_shared_instance()
    {
        if (self::$shared_instance === NULL) { 
            self::$shared_instance = new self();
        } 

        return self::$shared_instance;
    }

/// Constructor made private to be used with singleton.
final protected function __construct(){ $this->initiate(); }

/// Do not allow the clone operation: $x = clone $v;    
final protected function __clone() { }

private function settings_by_domain()
{
    $current_domain = $_SERVER['HTTP_HOST'];
    $path = pathinfo(__FILE__, $options = PATHINFO_DIRNAME);
    $settings_file = $path.'/'.$current_domain.'.php';

    if (is_file($settings_file))
    {
        $this->settings_file = $settings_file;
        return TRUE;
    }
    else
    {
        return FALSE;
    }
}

所需文件包含:

$c = self::get_shared_instance();

不幸的是,当run创建一个新实例时会发生什么?

非常感谢