A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: libraries/Auth_web.php

Line Number: 18

Backtrace:

File: /home4/cse48806/public_html/application/libraries/Auth_web.php
Line: 18
Function: _error_handler

File: /home4/cse48806/public_html/application/controllers/Index.php
Line: 6
Function: __construct

File: /home4/cse48806/public_html/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home4/cse48806/public_html/system/core/Exceptions.php:271)

Filename: helpers/url_helper.php

Line Number: 561

Backtrace:

File: /home4/cse48806/public_html/application/libraries/Auth_web.php
Line: 19
Function: redirect

File: /home4/cse48806/public_html/application/controllers/Index.php
Line: 6
Function: __construct

File: /home4/cse48806/public_html/index.php
Line: 315
Function: require_once