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

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

------解决方案--------------------
构造函数名写错了！
__construct
写成了
__constuct

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

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