Do you think Java, perl and PHP make a good career choice?

Not if your career is a doctor, or car mechanic, no. Seriously, it depends on what you want to work on. If you are going to work on web applications then PHP might be a way to go, but if you are working on massively parallel proccessors and numeric modelling then FORTRAN would probably be more useful.
You already have a reasonable mix. Java people tend to like Python, and there is a Jython (although it lags behind CPython). PHP syntax is superfically similar to Perl, so is fairly easy (if frustrating) to learn. Honestly I wouldn't bother unless you have a need.

Looking at job vacancies then C# might be a safer bet, and it is only Microsoft's version of Java after all, isn't it? If you are looking for pastures new, then learning relational database theory and SQL often comes in handy.