What kind of different request and response scopes are there in PHP?
<p>I slightly remember from my age old Java days, that there was an RequestScope object and a Response object. RequestScope contained the POST headers sent from browsers and the GET arguments. Well, it's a few years ago, might be inaccurate.</p>

<p>What kind of scopes for request and response are there in PHP environment? Well I think there's a $_GET and $_POST (sorry if wrong, I'm just a few days new to PHP). Is that the only thing? Where does the output go?</p>
