A PHP Error was encountered

Severity: Warning

Message: Undefined array key "HTTP_REFERER"

Filename: controllers/Main.php

Line Number: 55

Backtrace:

File: /home2/vqsapqmy/public_html/pos_restaurant/app/controllers/Main.php
Line: 55
Function: _error_handler

File: /home2/vqsapqmy/public_html/pos_restaurant/index.php
Line: 273
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home2/vqsapqmy/public_html/pos_restaurant/system/core/Exceptions.php:271)

Filename: helpers/url_helper.php

Line Number: 564

Backtrace:

File: /home2/vqsapqmy/public_html/pos_restaurant/app/controllers/Main.php
Line: 55
Function: redirect

File: /home2/vqsapqmy/public_html/pos_restaurant/index.php
Line: 273
Function: require_once