Let me give you a good example of why it's good to use PHP..
The forum I use to run got so many hits that it crashed constantly.. It was mostly because sooo many instances of perl executing that my machine would slow way down and the db couldn't handle it etc..
PHP only has one instance, it runs from the server level.. So it keeps things speedy and crashes less on an active forum.. (That means 100 hits at once, doesn't cause perl to run 100 times on your server, executing the same file..)
Also I think PHP can keep a persistent connection to the db where as Perl can't (Maybe mod_perl?) which cuts down on all of the db activity..
I still think Perl is a lot more fun to develop in though.. Especially when you start doing OO stuff (adds some spice to the same old boring Perl stuff) =)
Jeremy 'PeelBoy' Amberg