Fatal error: Call to a member function query() on a non-object in G:\wamp\apache

Fatal error: Call to a member function query() on a non-object in G:\wamp\apache这是错误信息这个是

Fatal error: Call to a member function query() on a non-object in G:\wamp\apache
这是错误信息 $Fatal error: Call to a member function query() on a non-object in G:\wamp\apache,该如何解决$
这个是类 $Fatal error: Call to a member function query() on a non-object in G:\wamp\apache,该如何解决$
这个是调用页面 $Fatal error: Call to a member function query() on a non-object in G:\wamp\apache,该如何解决$ php错误
[解决办法]
构造函数名写错了！
__construct
写成了
__constuct