A couple of weeks ago I’ve found this project, it’s name is GoPHP5 and it’s main goal is to speed up the transition of old PHP applications to the newer versions.
I totally agree with this project ideas and support them 100%, in my opinion it doesn’t make sense to keep developing applications using old PHP versions.
At the moment there are already a couple of big projects associated such as Drupal, CMS Made Simple, phpMyAdmin and others.
If you’re going to develop a new project or develop new features to an existing one, take a look at the website, spend some time reading and GoPHP5.
At the moment I’m only working with PHP5 and I’ve got to say, the new features are great.