I've been reading the online php documentation but I find it to be over my head a lot of the time, so thought I'd ask this (probably) simple question here.

Rather than putting a note on the search page instructing the user to hit reload/refresh in their browser each time they land on the page using the back button, I'd like to include some coding to make that happen automatically.

I've tried including: <meta http-equiv="pragma" content="no-cache"><meta http-equiv="expires" content="-1"> in the head area but that doesn't clear the fields. I've also tried adding (instead of the previous code) <meta http-equiv="refresh" content="600"> but that doesn't work either.

Any suggestions? I know this is more an html question than php but since the search fields are inside php tags I figured I'd better ask here, just in case.