A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Api.php

Line Number: 554

Backtrace:

File: /home/mzkbydgo/public_html/ci/application/controllers/Api.php
Line: 554
Function: _error_handler

File: /home/mzkbydgo/public_html/index.php
Line: 291
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/mzkbydgo/public_html/ci/system/core/Exceptions.php:272)

Filename: controllers/Api.php

Line Number: 554

Backtrace:

File: /home/mzkbydgo/public_html/ci/application/controllers/Api.php
Line: 554
Function: header

File: /home/mzkbydgo/public_html/index.php
Line: 291
Function: require_once