Get URL query string parameters

Question

What is the \"less code needed\" way to get parameters from a URL query string which is formatted like the following?

www.mysite.com/category/subcateg

Answer 1

Thanks to @K. Shahzad This helps when you want the rewrited query string without any rewrite additions. Let say you rewrite the /test/?x=y to index.php?q=test&x=y and you want only want the query string.

function get_query_string(){

    $arr = explode("?",$_SERVER['REQUEST_URI']);
    if (count($arr) == 2){
        return "";
    }else{
        return "?".end($arr)."
";
    }       
}
$query_string = get_query_string();