Textastic offers syntax highlighting for many languages including PHP, but it dosen't include compilers or interpreters due to restrictions of iOS.
If you try to preview the php file locally, only the html part will be interpreted by the web view. The PHP part will be ignored.
In order to preview PHP in Textastic, you can upload the file to a test server, open the preview screen,
and enter the remote url of your test server.
Ah, ok....I understand all that. Is a shame as I was only going to be using this app offline as my iPad doesn't have 3G and I'm not running a web server yet so it's not going to be much use to me at the moment. Although I appreciate this is a good app and well done on the development but is there any chance I can get a refund as it's no use to me?
Customer support service by UserEcho