A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: models/Users_model.php

Line Number: 50

Backtrace:

File: /home/webohubc/public_html/manage/application/models/Users_model.php
Line: 50
Function: _error_handler

File: /home/webohubc/public_html/manage/application/controllers/Signin.php
Line: 96
Function: sign_out

File: /home/webohubc/public_html/manage/index.php
Line: 288
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/webohubc/public_html/manage/system/core/Exceptions.php:271)

Filename: helpers/url_helper.php

Line Number: 564

Backtrace:

File: /home/webohubc/public_html/manage/application/models/Users_model.php
Line: 50
Function: redirect

File: /home/webohubc/public_html/manage/application/controllers/Signin.php
Line: 96
Function: sign_out

File: /home/webohubc/public_html/manage/index.php
Line: 288
Function: require_once