Zend Studio or Eclipse PDT project managment

After years of using notepad++ for web development I've decided to start using some IDE. I've开发者_运维问答 tried both: Zend Studio and Eclipse PDT. It appears they are pretty much similar.

When working on multiple projects I used to make "sessions" in notepad++ to keep each project files opened in editor. How do I achieve that in Zend Studio or Eclipse PDT? I mean when switching the project, I want one set of files to be closed in editor and another one to be opened.

Try Aptana studio, use the plugin manager to add PDT and other dev' support. for me it was the best solution. (It's eclipse, but very featured)