How to install a PHP IDE plugin for Eclipse directly from the Eclipse environment?

Easy as pie:

Open Eclipse and go to Help-> Software Updates-> Find and Install Select "Search for new features to install" and click "Next" Create a New Remote Site with the following details:

Name: PDT

URL: http://download.eclipse.org/tools/pdt/updates/4.0.1

Get the latest above mentioned URLfrom -

http://www.eclipse.org/pdt/index.html#download

Check the PDT box and click "Next" to start the installation

Hope it helps

To install PDT (PHP Development Tools) for PHP development environment is better in Eclipse. The following are the steps to install PDT in Eclipse (I'm considering version 3.7 (Indigo)):

1. Open Eclipse (in my case Eclipse Indigo).
2. Go to Help --> Install New Software...
3. Expand the "Work with" drop down and select "Indigo - http://download.eclipse.org/releases/indigo".
4. Expand "Programming Languages" from the list.
5. Check PHP Development Tools (PDT) SDK Feature.
6. Click "Next >" at the bottom and follow the further instruction of Eclipse.
7. After successful installation of PDT: Go to Window --> Preferences and see the list as PHP at left panel.

Open up eclipse, go to "Help -> Install New Software". Enter:

http://download.eclipse.org/releases/juno

entry from the "Work with" dropdown.

Under the "Web, XML, Java EE and OSGi Enterprise Developmet" category, select "PHP Development Tools (PDT) SDK Feature 3.1.1.201209101312".