Choosing Tomcat vs php4

[roland benedetti]

Hello,
I need ressources to argue for the choice of Tomcat J2EE against PHP4.
The solution is needed for a web site delivering content to a huge 
amount of users.

If you heard about bench or studies proving the better scalability of 
Tomcat or any J2EE server, thanks to send me where to find the info.

--
luro