I am installing a server for max 10 small web sites. I am going to use mainly Joomla. Is it better to use already PHP5? I have debian Sarge. I know that I would have to install it from backports or from http://www.dotdeb.org/mirrors Thanks for advice.
There are only a few apps that run on php4 but not on php5... so if you are positive that you need none of those I would go for php5. Joomla, according to my knowledge, runs fine on php5... However if you ever get in the need of requiring php4, there is a howto on how you can run both on your (debian) server... I think it's a howto from Falko.