Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, PDO given in /var/www/bootg/function.php:310 Stack trace: #0 /var/www/bootg/function.php(310): mysqli_query() #1 /var/www/bootg/add.php(93): insert() #2 {main} thrown in /var/www/bootg/function.php on line 310