I'm looking for a web application whereby a user could come along, and from their web browser, edit a page of php "live" and then save it. I'm not worried about anything like permissions, since I'd be using Wordpress in conjunction with it to limit its use. Thanks in advance.
i'd do an echo to text area, and use it as a value to post, compare the old value with the new value, if it's different, open up the file, rewrite the whole content with the new value and close the file.