A PHP Error was encountered

Severity: Notice

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

Filename: helpers/custom_helper.php

Line Number: 314

Backtrace:

File: /var/www/varient/application/helpers/custom_helper.php
Line: 314
Function: _error_handler

File: /var/www/varient/application/views/nav/_nav_mobile.php
Line: 17
Function: getURL_byCARRIER

File: /var/www/varient/application/views/partials/_header.php
Line: 147
Function: view

File: /var/www/varient/application/controllers/Auth_controller.php
Line: 316
Function: view

File: /var/www/varient/index.php
Line: 325
Function: require_once