I have a simple pre-existing ajax form on a php website (site 1) which submits to a mySQL db hosted on a typical Linux server. My client wants to use the same form in a landing page on another domain which is running php but is hosted on a Windows server with MSSQL (site 2). I am not experienced with MSSQL so rather than rebuilding the whole thing on site 2, I am thinking that it might be simpler to just build the landing page on site 2 with an iFrame that pulls the remote ajax form from site 1.
I do have FTP access to both servers plus cPanel access on site 1 and remote desktop access on site 2.
Do you have any thoughts or recommendations regarding functionality or security problems with an iFrame setup like that?