Fatal error: Uncaught PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'index.html' in 'where clause' in /var/www/html/naming-dic/public/cate.html:19 Stack trace: #0 /var/www/html/naming-dic/public/cate.html(19): PDO->query() #1 {main} thrown in /var/www/html/naming-dic/public/cate.html on line 19