I'll consider adding it as an option.

The current version of Textastic doesn't have persistent undo history, sorry.

Hello,

that's actually the default behavior of Textastic.

Make sure that this feature is enabled in your system preferences. Under "General", the following option must not be checked:

You can send a screenshot to support@textasticapp.com - thanks!

You should be able to edit PHP files with syntax highlighting, but the local preview doesn't interpret PHP.

Textastic offers syntax highlighting for many languages including PHP, but it doesn'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, switch from "Local" to "Remote" and enter the remote url of your test server.

Unfortunately, this is a limitation of iTunes file transfer.

I'd recommend using another option like Dropbox or the WebDAV server to transfer files and folders to Textastic.

Please send me the diagnostic reports, that would be very helpful. You can send it to support@textasticapp.com