$p = new RestAPI($auth_id, $auth_token);
# Link an application to a number
$params = array('number' => '1111111111', 'app_id' => '16638156474000802');
#$response = $p->link_application_number($params);
#print_r ($response);
/*
Sample Output
(
    [status] => 202
    [response] => Array
    (
        [api_id] => 3ca792ba-b68c-11e4-af95-22000ac54c79
        [message] => changed
    )
)
*/
# Unlink an application from an number
$params = array('number' => '1111111111');
$response = $p->unlink_application_number($params);
print_r($response);
/*
Sample Output
(
    [status] => 202
    [response] => Array
    (
        [api_id] => 50640c34-b68c-11e4-8ccf-22000afb14f7
        [message] => changed
    )
)
*/