/*
Sample Output
(
    [status] => 201
    [response] => Array
    (
        [api_id] => 405f14e8-b68a-11e4-b932-22000ac50fac
        [message] => created
        [numbers] => Array
        (
            [0] => Array
            (
                [number] => 12109206499
                [status] => Success
            )
        )
        [status] => fulfilled
    )
)
*/
# Unrent a number
$params = array('number' => '12109206499');
$response = $p->unrent_number($params);
print_r($response);
/*
Sample Output
(
    [status] => 204
    [response] => 
)
*/