A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 0

Filename: models/Tag_model.php

Line Number: 568

Backtrace:

File: /var/www/html/mobile/application/models/Tag_model.php
Line: 568
Function: _error_handler

File: /var/www/html/mobile/application/models/Tag_model.php
Line: 426
Function: buildArticle

File: /var/www/html/mobile/application/controllers/Tag.php
Line: 72
Function: getArticleTagDataSearch

File: /var/www/html/mobile/index.php
Line: 315
Function: require_once