Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 12 in /var/www/html/system/core/db.php:150 Stack trace: #0 /var/www/html/system/core/db.php(150): mysqli_query() #1 /var/www/html/system/core/db.php(174): db->query() #2 /var/www/html/application/model/model_file.php(7): db->select() #3 /var/www/html/application/control/expertDocs.php(406): model_file->get_file_section() #4 /var/www/html/system/core/engin.php(138): expertDocs->display_file() #5 /var/www/html/index.php(63): require_once('...') #6 {main} thrown in /var/www/html/system/core/db.php on line 150