Chiakumu Hyana
Okay, time for you guys to start doing some research.
An advantage to using PHP is that there is loads of sourcecode out there for use. However, it's not meant to be run for a long time.
An advantage to using Java is that it is build to last but much more complicated.
Go do some research, and then come back and tell me which one you prefer.
Where did you hear such lies?
Your summaries are quite inaccurate. PHP is a very stable and reliable scripting language for developing dynamic web pages. Despite very widespread adoption (to the point that it is considered a cornerstone of Web 2.0) it has not been standardized. The language spec and reference implementation are essentially one in the same.
Java is a standardized language, however it was written with a very different target usage. For things like web forums, Java will never match PHP in performance or scalability. There is a huge amount of overhead to run Java code on a public web server which makes it unsuitable for high-traffic sites. Web application servers (eg Tomcat, or JBoss) are designed for internal company websites only.