My day job is basically as a feature programmer for a perl based web application system. Trust me. Learn python / ruby for web applications. Or stick to PHP.

The thing that made people love Perl is the same thing that makes more mature people hate it. The language is so flexible that you will invariably write bad code. You need a very strong set of coding standards if you'd like to write perl systems that remain maintainable.

Learn python or ruby to make your web app. Learn C# / ASP.Net if you'd like to be on a windows stack.