Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1 in /var/www/vhosts/busyspr.com/public_html/framework/f_query.php:52 Stack trace: #0 /var/www/vhosts/busyspr.com/public_html/framework/f_query.php(52): mysqli_query() #1 /var/www/vhosts/busyspr.com/public_html/framework/f_db.php(108): f_query->__construct() #2 /var/www/vhosts/busyspr.com/public_html/component/ccourse/controller.php(396): f_db->query() #3 /var/www/vhosts/busyspr.com/public_html/framework/f_controller.php(79): c_ccourse->do_recomend() #4 /var/www/vhosts/busyspr.com/public_html/component/ccourse/controller.php(13): f_controller->run() #5 /var/www/vhosts/busyspr.com/public_html/framework/f_router.php(61): c_ccourse->index() #6 /var/www/vhosts/busyspr.com/public_html/index.php(30): f_router->run_component() #7 {main} thrown in /var/www/vhosts/busyspr.com/public_html/framework/f_query.php on line 52