Developing a socket based flash comminication server... PHP or JAVA?

Hi guys, I need to develop a socket based server for multiplayer flash games. Should I go with PHP or JAVA. I want to go with PHP but my main concern is is it as fast as JAVA and can it handle say 10,000 simultaneous connections?

Any thoughts appreciated.

Thanks.

 

I believe your looking for a pre-built Adobe (I still prefer to call them Macromedia) App

http://www.adobe.com/products/flashmediaserver/
The scalable media server for streaming interactive media applications