By using Eclipse as PHP developing tool, I quite like to use EasyPHPEclipse rather than PDT.
Also, it’s better to have below plugins to make development easier.
Name: Zend Debugger
URL: http://downloads.zend.com/pdt
Name: JSEclipse
URL: http://download.macromedia.com/pub/labs/jseclipse/autoinstall/site.xml
Name: Subclipse
URL:http://subclipse.tigris.org/update_1.4.x
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