How to isolate keywords from url

[sal]

Any idea how from the following url

http://www.google.com/search?sourceid=navclient&q=corvette+exhausts

or from

http://www.google.com/search?q=corvette+exhausts&sourceid=opera&num=100&ie=utf-8&oe=utf-8

I can extract the keywords corvette exhausts AND the search engine Google?

I am trying to show the keywords people search the search engine with and possible show the rannking

Dunno if its possible

Thanks anyway

Sal

[Mordecai]

Assuming you were visiting this URL:
http://www.google.com/search?q=corvette+exhausts&sourceid=opera&num=100&ie=utf-8&oe=utf-8

This is how you would read and parse what's been queried:
$query = $_GET["q"];
$words = split("+",$query);
for ($i=0;$i<=count($words);$i++) {
echo($words[$i]);
}

This echos out each key word.

[sal]

However I am getting this error message:

Warning: REG_BADRPT

I am not too sure how the code refers to the url though

Here is how I attempted it:

$sql = "SELECT * FROM site_stats WHERE referer LIKE '%google%' ";

$result = mysql_query($sql) or die(mysql_error());

while ($i = mysql_fetch_array($result)) {

$url=$i["referer"];

$query = $_GET["q"];
echo "$query";
$url = split("+",$query);
for ($i=0;$i<=count($words);$i++) {
echo($words[$i]);
}

[sal]

I did end the while statement

while ($i = mysql_fetch_array($result)) {
$url=$i["referer"];
$query = $_GET["q"];
echo "$query";
$url = split("+",$query);
for ($i=0;$i<=count($words);$i++) {
echo($words[$i]);
}
}

[sal]

I also tried

$words = split("+",$query);

instead of

$url = split("+",$query);