title: Eclipse, perspectives that change the open files in editor
body: <p>Is it possible to configure eclipse to display different files depending on the perspective?</p>
  
  <p>Say I have a PHP and a PyDev project. In the PHP perspective it would show just my open PHP files. If I switch to the PyDev, it will open up the last python files I had. If I switch back to the PHP perspective, it displays the same PHP files I had open just a minute ago.</p>
  
  <p>This would be beneficial when working on two different projects at the same time.</p>