A PHP Error was encountered

Severity: Notice

Message: Undefined variable: head

Filename: default/layout.php

Line Number: 458

Backtrace:

File: /home/nhatrangde/domains/nhatrangdev.vn/public_html/application/views/themes/default/layout.php
Line: 458
Function: _error_handler

File: /home/nhatrangde/domains/nhatrangdev.vn/public_html/application/core/MY_Controller.php
Line: 78
Function: view

File: /home/nhatrangde/domains/nhatrangdev.vn/public_html/application/core/MY_Controller.php
Line: 227
Function: render

File: /home/nhatrangde/domains/nhatrangdev.vn/public_html/application/controllers/Posts.php
Line: 160
Function: render

File: /home/nhatrangde/domains/nhatrangdev.vn/public_html/index.php
Line: 315
Function: require_once