A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: models/Posts_model.php

Line Number: 74

Backtrace:

File: /home/inicsirt/public_html/application/models/Posts_model.php
Line: 74
Function: _error_handler

File: /home/inicsirt/public_html/application/controllers/Posts.php
Line: 36
Function: ModulReadSingle

File: /home/inicsirt/public_html/index.php
Line: 289
Function: require_once