what's the difference between "proxy_cache" and "fastcgi_cache"?

 

     I know that "proxy_cache" is often used for static pages(or elements), and "fastcgi_cache" is usually used for dynamic script(*.php,*.jsp etc.).

 

     But what's difference between their implementation?   what content is cached by "fastcgi_cache", the script file itself or the interpretted HTML file?

 

     Thanks in advance.

 

 

by piger