网站500错误 报错如下？

A PHP Error was encountered

Severity: Runtime Notice

Message: Declaration of MY_URI::filter_uri() should be compatible with CI_URI::filter_uri(&$str)

Filename: core/MY_URI.php

Line Number: 7

Fatal error: Call to a member function row_array() on a non-object in/www/wwwroot/zhidao.xxbite.com/zh优艾设计网_电脑技术idao.perfte.com/application/models/User_model.phpon line305

A PHP Error was encountered

Severity: Error

Message: Call to a member function row_array() on a non-object

Filename: models/User_model.php

Line Number: 305