PHP Query String Manipulation

Question

Any one have the ultimate PHP function(s) to add/remove parameters from a query string? It needs to handle all possible cases, Ive seen ones that handle some cases, but not

Answer 1

This is the sketch for the function you can start with:

function add_get_param($url, $param, $value)
{
        $parts_url = parse_url($url);

        parse_str($parts_url['query'], $parts_query);

        $parts_query[$param] = $value;

        return $parts_url['scheme'] . '://' . $parts_url['host'] . '/' . $parts_url['path'] . '?' . http_build_query($parts_query);
}

var_dump(add_get_param('http://mysite.com?param1=1¶m2=2', 'param3', 3));

UPD: since parse_str breaks the data (replaces dots with underscores) I don't think this sketch is useful.