例子记录如下:
private static $_instance;
public static function getInstance()
{
if (!self::$_instance instanceof self) {
self::$_instance = new self;
}
return self::$_instance;
}
例子记录如下:
private static $_instance;
public static function getInstance()
{
if (!self::$_instance instanceof self) {
self::$_instance = new self;
}
return self::$_instance;
}