I've been searching but cannot find an answer (only how to use $_GET[]).

Basically I have a log file of hundreds of URLs. Each URL has many GET variables. How can I extract the contents of those variables without being on that page?

For instance, let's say I have the following URL in a log file:
PHP Code:
http://vbforums.com/newthread.php?do=newthread&f=27 
Let's say the next URL looks like this:
PHP Code:
http://vbforums.com/newthread.php?f=27&do=newthread 
Now to newthread.php, they mean the samething. It passes the f and do variables with the contents of 27 and newthread. But how do I get the contents of those variables reliably from a completely different page with only the URL given to me?

(In case anyone was wondering, I'm parsing through a Google-Mini server's logs and need to extract contents out of URLs)