A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 0

Filename: models/Rank_model.php

Line Number: 54

Backtrace:

File: /home/bestfile/public_html/application/models/Rank_model.php
Line: 54
Function: _error_handler

File: /home/bestfile/public_html/application/controllers/Cpc.php
Line: 59
Function: site_info_one

File: /home/bestfile/public_html/index.php
Line: 315
Function: require_once