As I mentioned from my previous blog, a how to in web development in Linux (September 2007), you just download the Eclipse IDE package in Zend. This package contains the zend debugger for debugging PHP scripts, but for a web server, you may use zend or xdebug.
Here is how to install xdebug:
1.In Synaptic: Install php-pear and php5-dev
2.In terminal: #sudo pecl install xdebug
3.Add these 2 lines to php.ini:
zend_extension="(path to xdebug.so)"
4.In Eclipse, click “debug” icon->Open Debug Dialog->PHP Web Page->New->choose Xdebug in Server Debugger.