An uncaught Exception was encountered

Type: Error

Message: Call to undefined function base_url()

Filename: /www/wwwroot/wanfang.fengzhishike.cn/127.0.0.1/application/views/errors/html/error_404.php

Line Number: 9

Backtrace:

File: /www/wwwroot/wanfang.fengzhishike.cn/127.0.0.1/index.php
Line: 316
Function: require_once