A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: product/detail.php

Line Number: 236

Backtrace:

File: /mnt/qiyezhan/zjslyr/application/client/views/product/detail.php
Line: 236
Function: _error_handler

File: /mnt/qiyezhan/zjslyr/application/client/controllers/Product.php
Line: 130
Function: view

File: /mnt/qiyezhan/zjslyr/index.php
Line: 316
Function: require_once