PHP form upgrading

To my site [login to view URL] which currently has a Perl script form and needs to be upgraded to PHP. Similar in functions but good security against hacking attacks. I live in Pattaya, Thailand so we can meet when needed because you are from here too. The server (HostGator) requires SMTP mail to be used. The form sends emails to me, the supplier and to the client. At present the site is not functioning completely because I am not able to change the script to send mail by SMTP. The script became subject of a hacking attack at another server and I had to remove it and need now this upgrading. Anyway, feel free to play with it's functions, it will stop just before sending the emails. The current script is AlienForm2 v 1.5 without modifications. I have only adapted it for my need. More from farang at tuta dot io.