How to add parameter to a PHP file?

Hi...
How to add parameter to a PHP file, like http://www.domain.com/search.php?q=line1+line2+line3

Thank you so much for helps.

best regards

www.com.com/search.php?q=line1&lang=en-gb&blah=ness

$query = $_GET['q']; // assign line 1 to $query
$lang = $_GET['lang']; // assign en-gb to $lang
$blah = $_GET['blah']; // assign ness to $blah
do stuff;

thank you... your help is very usefull for me... :)

how about '+' sign? how to implemented in address? like ...search.php?q=word1+word2

thank you...

If you wanted a + you would need to put %2B in instead, look at this page (http://www.degraeve.com/reference/urlencoding.php) if you want to include other characters