Configure xDebug with Zend Studio or Eclipse IDE

system: gentoo | php: 5.3.3 | xdebug: 2.0.5

1. Install xdebug: emerge dev-php/xdebug-client -av
2. Edit php.ini: Include xdebug configuration file in php.ini.

• create and put xdebug.ini file in directory: /etc/php/apache2-php5/ext/
• create soft link: ln -s /etc/php/apache2-php5/ext/xdebug.ini /etc/php/apache2-php5/ext-active/
•  xdebug.ini file content:  

[xdebug]

zend_extension=/usr/lib/php5/lib/extensions/no-debug-zts-20090626/xdebug.so
xdebug.auto_trace="0"
xdebug.trace_output_dir="/tmp"
xdebug.trace_output_name="trace.%c"
xdebug.trace_format="0"
xdebug.trace_options="0"
xdebug.collect_includes="1"
xdebug.collect_params="0"
xdebug.collect_return="0"
xdebug.collect_vars="0"
xdebug.default_enable="0"
xdebug.extended_info="1"
xdebug.manual_url="http://www.php.net"
xdebug.max_nesting_level="100"
xdebug.show_exception_trace="0"
xdebug.show_local_vars="0"
xdebug.show_mem_delta="0"
xdebug.dump.COOKIE="NULL"
xdebug.dump.ENV="NULL"
xdebug.dump.FILES="NULL"
xdebug.dump.GET="NULL"
xdebug.dump.POST="NULL"
xdebug.dump.REQUEST="NULL"
xdebug.dump.SERVER="NULL"
xdebug.dump.SESSION="NULL"
xdebug.dump_globals="1"
xdebug.dump_once="1"
xdebug.dump_undefined="0"
xdebug.profiler_enable="0"
xdebug.profiler_output_dir="/tmp"
xdebug.profiler_output_name="cachegrind.out.%p"
xdebug.profiler_enable_trigger="0"
xdebug.profiler_append="0"
xdebug.profiler_aggregate="0"
;xdebug.remote_enable="0"
xdebug.remote_enable=On
xdebug.remote_handler="dbgp"
xdebug.remote_host="localhost"
xdebug.remote_mode="req"
;xdebug.remote_port="9000"
xdebug.remote_port=9000
xdebug.remote_autostart="0"
;xdebug.remote_log=""
xdebug.remote_log="/var/www/xdebug.log"
xdebug.idekey=""
xdebug.var_display_max_data="512"
xdebug.var_display_max_depth="2"
xdebug.var_display_max_children="128"

3. Check  phpinfo(). If all OK, you will see  "xdebug section"
4. Configure Zend Studio.

• Open your project in Zend Studio
• In the main menu select Project->Properties
• On the left side of the window select "PHP Debug" and then click on "Configure Workspace Settings"
• On the "PHP Debugger" dropdown select Xdebug and click "Apply"
• Click "Configure" to the right of Xdebug in the same window.
• Select Xdebug and click "Configure".
• On the "Accept remote session(JIT)" select "any" and click "OK". This is extremely important and this is where most people get stuck.

5. Debug!!! :)

PS. Big thanks to Bogdan the author of this post: http://bogdan-albei.blogspot.com/2010/06/php-remote-debugging-with-xdebug-and.html

very helpfull for me!