Shoutbox

I need help with PHP since I'm not an expert in it.

So I have a form containing a table that goes to itself, and inside it there's a button that does some operation X.
What I want is, after the button's pushed, I want the page gets refreshed so the table content is updated.

What PHP code should I add near operation X?

I did google this, but all solutions I found were for auto-refreshing a page

Thanks.