phpstorm xdebug with a symfony2 project

Question

I am trying to debug a symfony2 application with xdebug and phpstorm.

My local development environment is Ubuntu 14.04 with apache2 and Xdebug version is 2.2.7

I

Answer 1

It was a mapping problem. The following are the steps which did the trick

1. Disable path mapping under Settings > Languages & Frameworks > PHP > Servers > uncheck "Use path mappings
2. Start debugging
3. The famous “Remote file path ‘path/to/script/on/the/server.php’ is not mapped to any file path in project“ finally appears
4. Then I could follow the Troubleshooting section in official guide setting up path mappings

Hope this helps to anyone else