A PHP Error was encountered

Severity: Warning

Message: call_user_func_array() expects parameter 1 to be a valid callback, class 'PageController' does not have a method 'page_404'

Filename: core/CodeIgniter.php

Line Number: 533

Backtrace:

File: /var/www/blog.w3/public_html/index.php
Line: 146
Function: require_once