A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 0

Filename: controllers/Index.php

Line Number: 687

Backtrace:

File: /var/www/html/application/controllers/Index.php
Line: 687
Function: _error_handler

File: /var/www/html/index.php
Line: 327
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /var/www/html/system/core/Exceptions.php:271)

Filename: helpers/url_helper.php

Line Number: 564

Backtrace:

File: /var/www/html/application/controllers/Index.php
Line: 937
Function: redirect

File: /var/www/html/index.php
Line: 327
Function: require_once