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.

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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)