A PHP Error was encountered

Severity: Notice

Message: Undefined index:

Filename: controllers/Contents.php

Line Number: 92

Backtrace:

File: /home/idthai17/public_html/application/controllers/Contents.php
Line: 92
Function: _error_handler

File: /home/idthai17/public_html/index.php
Line: 325
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/idthai17/public_html/system/core/Exceptions.php:271)

Filename: helpers/url_helper.php

Line Number: 561

Backtrace:

File: /home/idthai17/public_html/application/controllers/Contents.php
Line: 95
Function: redirect

File: /home/idthai17/public_html/index.php
Line: 325
Function: require_once