referring search engine url, get key words

[mfacer]

hey,

I am working on a bit of code to split up the referrers link....
basically I need to say that if the referring URL is a search engine, get the keywords from the URL.

so far I use

$c_url = parse_url($GLOBALS[HTTP_REFERER]);

which means I can then use $c_url['host'] etc for accessing the host etc.

I wanted to know if anyone had already written any code which does this for each search engine?

I was thinking of doing

switch ($c_url['host'])
{
case "www.google.com":
//query string starts with "q=xxxxxxxxx"
//split the string up and enter to DB
}

etc etc

basically listing all the search engines and what they use for their query string.

has anything like this been done before??

thanks.

[sarahk]

take alook at the code I wrote here: http://www.phpclasses.org/browse.html/package/1071.html

the rules have changed abit and the query strings differ but there are still some basic calls you can make.

Some of the search engines don't post the search string in the url but give the search an id (not helpful)