A PHP Error was encountered

Severity: Warning

Message: Use of undefined constant USER_ID - assumed 'USER_ID' (this will throw an Error in a future version of PHP)

Filename: layout/header.php

Line Number: 595

Backtrace:

File: /home/allkisaan.com/public_html/application/views/front/layout/header.php
Line: 595
Function: _error_handler

File: /home/allkisaan.com/public_html/application/core/MY_Controller.php
Line: 174
Function: view

File: /home/allkisaan.com/public_html/application/controllers/ProductDetails.php
Line: 101
Function: show_view_codeyearn

File: /home/allkisaan.com/public_html/index.php
Line: 315
Function: require_once