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Notice: Could not connect to server in /var/www/html/Admin/include/MySQL.php on line 81

Fatal error: Uncaught Error: Call to a member function query() on bool in /var/www/html/Admin/include/MySQL.php:116 Stack trace: #0 /var/www/html/yahoo_mall/category.php(29): MySQL->query() #1 {main} thrown in /var/www/html/Admin/include/MySQL.php on line 116