Thanks Ray,
I think I carried out those items correctly but I get an error message
Access forbidden!
You don't have permission to access the requested object. It is either read-protected or not readable by the server.
If you think this is a server error, please contact the webmaster.
Error 403
localhost
Apache/2.4.29 (Win32) OpenSSL/1.0.2l PHP/5.6.32
This text was in the address bar.
http://localhost/boatsforsalenow_mysqli2/BoatAdds180Premium%20from%20BFSNow.com/%3Cbr%20/%3E%3Cb%3ENotice%3C/b%3E:%20%20Undefined%20variable:%20editFormAction%20in%20%3Cb%3EC:/xampp/htdocs/boatsforsalenow_mysqli2/BoatAdds180Premium%20from%20BFSNow.com/boats_Insert_Premium.php%3C/b%3E%20on%20line%20%3Cb%3E207%3C/b%3E%3Cbr%20/%3E