A PHP Error was encountered

Severity: Notice

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

Filename: helpers/functions_helper.php

Line Number: 217

Backtrace:

File: /home/sagat/htdocs/sagat.in/application/helpers/functions_helper.php
Line: 217
Function: _error_handler

File: /home/sagat/htdocs/sagat.in/application/controllers/Notification.php
Line: 7
Function: auth_login

File: /home/sagat/htdocs/sagat.in/index.php
Line: 318
Function: require_once