[What is the difference between Apache Web Server and Tomcat?]

I know a bit of Java/JSP and a little (I thought) on Tomcat.

 

I now want to start using PHP (for use between MySql and Flash).

 

I thought I could simply write PHP scripts and use them in exactly the same way as JSP\'s using the Tomcat server. Even the simple \"Hello World\" doesn\'t appear to work ?

 

I\'m now thinking that I need to use Apache Webserver - but haven\'t got a clue as to the differences between this and Tomcat ?!? What is the relationship between these two products - as I now understand that you can somehow run Tomcat from within Apache - What does this all mean exactly ?!?

 

Servers !?! Servlet Containers !?! Very Confusing !! But would appreciate any pointers !!

 

Cheers,

 

Matt.