A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 21

Filename: controllers/Error.php

Line Number: 28

Backtrace:

File: /home/studywhm/public_html/application/controllers/Error.php
Line: 28
Function: _error_handler

File: /home/studywhm/public_html/index.php
Line: 294
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/studywhm/public_html/system/core/Exceptions.php:272)

Filename: helpers/url_helper.php

Line Number: 564

Backtrace:

File: /home/studywhm/public_html/application/controllers/Error.php
Line: 28
Function: redirect

File: /home/studywhm/public_html/index.php
Line: 294
Function: require_once