The pages that follow detail how to install and configure many different flavours of Eclipse and many different plug-ins.
If you are just interested in the easiest way to get up and running with Eclipse, here's how:
- Go to http://www.eclipse.org/downloads/ and download "Eclipse for PHP Developers." This bundle includes several add-on components to extend Eclipse for web development tasks, including PHP Development Tools and Web Tools Platform.
- Extract it to wherever you normally put other programs, for example under /Applications on Mac, or Program Files on Windows and double-click on Eclipse to start it.
- The first time Eclipse starts, you'll be prompted for where to store your "workspace" (the primary spot you'll be working on Eclipse projects). If you're going to primarily use Eclipse for Drupal work, you may want to switch this to your local Apache docs directory instead (/Users/XXX/Sites, or similar). Either way, you can check the box to "Use this as the default and do not ask again," so it stops annoying you in the future.
- You'll probably also want to add Git support, which is provided by the EGit add-on. Go to Help > Install new software.... Under "Work with:" enter the URL http://download.eclipse.org/egit/updates/ and check the box next to "Eclipse Git Team Provider". Click Next, agree to license agreements, and complete the installation. Restart Eclipse when prompted.