A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/sehaonline/public_html/application/models/Category_model.php:1)

Filename: helpers/url_helper.php

Line Number: 564

Backtrace:

File: /home/sehaonline/public_html/application/controllers/Article.php
Line: 46
Function: redirect

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