Warning: Undefined variable $CartId in
/var/www/html/navigation.php on line
71
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/html/navigation.php:73
Stack trace:
#0 /var/www/html/navigation.php(73): mysqli_query(Object(mysqli), 'SELECT SUM(Cart...', 1)
#1 /var/www/html/view_product.php(49): require('/var/www/html/n...')
#2 {main}
thrown in
/var/www/html/navigation.php on line
73