A few months ago, I was working on a PHP project in Aptana Studio. It was version 1.5 or something. Later I installed Aptana 2.0 and created a new project with the same files. Back then it was UTF-8 so I chose UTF-8 for the project's text file encoding.
When I make changes in any PHP file using Aptana, it gives the error:
Warning: Cannot modify header information - headers already sent...
I know it's a problem related to encoding. What can I do?
by the way if it's any help i'm using session_start in my php code which causes this error. But i'm sure there's no error in my code because everything's ok in the unedited version of the files.
This happens, when you use unicode with BOM - Bytes Order Mark. Look up, if you don't have somewhere checked this option - it is default setting in Dreamweaver and it once gave headaches.
This probably isn't an encoding related problem. It's likely that you have a space or something before your opening PHP tag, so HTTP headers and the first character of the body are being sent to the client before you call header().