Define Google keyword from refferer

Want to know which keyword was used

[fromholland]

I get much google-traffic on my homepage, but I want to know which keyword was used. I will forward the visitors to a search-result page for the keyword they used to find my site.

Anyone knows how to get specify the keyword from a refferer?

[jatar_k]

if you trap the referrer using $_SERVER['HTTP_REFERER'] then take a look at the pattern of the query string you get.

that should help you better understand how to extract the keyphrase itself