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A PHP Error was encountered

Severity: Warning

Message: count(): Parameter must be an array or an object that implements Countable

Filename: pages/category_detail.php

Line Number: 83

Backtrace:

File: /home/ceovietnam.edu.vn/public_html/application/views/site/pages/category_detail.php
Line: 83
Function: _error_handler

File: /home/ceovietnam.edu.vn/public_html/application/controllers/Site.php
Line: 98
Function: view

File: /home/ceovietnam.edu.vn/public_html/index.php
Line: 291
Function: require_once