title: How downgrade a version of PHP in OpenSuse?
body: <p>I hope someone will help me here. 
  I need to downgrade a version of PHP 5.6 to 5.4 in OpenSuse 13.2, but can not find a detailed guide how to do it. I suppose that need to delete the current version, specify the repository with the old version, install PHP 5.4 out and block this package for updates. But how does it all done, and whether this algorithm is right really?</p>