So while I manage PHP programmers, I would love to get some feedback about the advantages of 5, as well as the advantages of no longer being limited by needing to support 4. We have an application that is on over 100,000 websites, and we are considering completely dropping PHP 4 (finally!).
One of the main reasons we have gone this long is we had some users that would have needed to switch hosts, but now it seems that 99% of hosts now have it, and often they have both 4 and 5 available, so the worst case scenario in most cases is simply coaching them on switching PHP 5 on (ex. through htaccess).
So if I may ask a couple of key questions:
1. What new found freedoms will our programmers have on 5?
2. Any last thoughts on why we may want to continue to support 4 a little longer?