eZ publish works on PHP 4 only. Look at this configuration: http://home.pl/files/phpinfo.php
Home.pl is not dedicated to eZ Publish, however there are several implementations there.
In case you know Polish (this is Polish ISP), you can ask for details on: http://www.ez-publish.pl
Ok, so more information about the company and hosting you can find here:
http://home.pl/ There is an opportunity to use English version (footer link).
They have a good infrastructure, but quite strange webserver. The main problem with PHP configuration is that it does not work in CLI mode. As a consequence the problems with upgrade and cronjobs appear.