shrinkURI() public method

IE: http://xmlns.com/foaf/0.1/knows => foaf:knows
public shrinkURI ( $uri )
$graph = new Graphite();
$xml = simplexml_load_file($URL);
foreach ($xml->getNamespaces(true) as $prefix => $uri) {
    $graph->ns($prefix, stripslashes($uri));
}
$graph->load($URL);
$properties = array();
if (array_key_exists('properties', $_REQUEST)) {
    $PROPS = $_GET['properties'];
    $properties = explode(",", $PROPS);
}
// Here, we grab a List of all of this type of class
$resources = $graph->allOfType($CLASS);
$json = array();
foreach ($resources as $instance) {
    $suri = $graph->shrinkURI(trim($instance));
    $add = array("id" => $suri);
    foreach ($properties as $prop) {
        $propname = trim($prop);
        $value = trim($instance->get($prop));
        $split = ARC2::splitUri($value);
        if ($split[1]) {
            $add[$propname] = $split[1];
        } else {
            $add[$propname] = $value;
        }
    }
    $json[] = $add;
}
file_put_contents($filename, json_encode(array("instances" => $json)));
print json_encode(array("instances" => $json));