The field under this rule must be a valid url format. The default is to validate the common format: any_scheme://.... You can specify specific URL schemes if you wish.

Example:

$validation = new Factory()->validate( $inputs ,
[
    'random_url' => 'url' ,          // value can be `any_scheme://...`
    'https_url' => 'url:http' ,      // value must be started with `https://`
    'http_url' => 'url:http,https' , // value must be started with `http://` or `https://`
    'ftp_url' => 'url:ftp' ,         // value must be started with `ftp://`
    'custom_url' => 'url:custom',   // value must be started with `custom://`
]);