How to do deployment for php application

Question

I am currently developing a php-application for a charity organization and I am now in the stage of defining the deployment practices.

Our application is using both Zend

Answer 1

I've used subversion as a deployment tool to great effect.

Use svn update on all your production servers, or use phing. (Or use phing to svn update, even.)

Makes rollbacks and backups a snap. Just remember to remove access to any .svn directories.