I've written the following to get the user IP:

private function getIpAddress()
    $server = JFactory::getApplication()->input->server;

    if (!empty($server->get('HTTP_CLIENT_IP')))
        $ip = $server->get('HTTP_CLIENT_IP');
    else if (!empty($server->get('HTTP_X_FORWARDED_FOR')))
        $ip = $server->get('HTTP_X_FORWARDED_FOR');
        $ip = $server->get('REMOTE_ADDR');

    return $ip;

I'd like to filter the value using the JFilterInput->clean() approach, using one of the options available, such as 'STRING', 'INT', etc.

I looked at INT, but don't think this will allow IP's with the following regex:

$pattern = '/[-+]?[0-9]+/';

as it doesn't accept a .(dot).

I then looked at CMD, and was wondering if this would be the best one to use as I believe it does allow a .(dot):

$pattern = '/[^A-Z0-9_\.-]/i';

Would it be best to use CMD? If not, which one? Or would be be best to use one of the native PHP filters?

1 Answer 1


For the time being, I've used PHP native filter_var with the FILTER_VALIDATE_IP filter, like so:

return filter_var($ip, FILTER_VALIDATE_IP);

I'm still of course open to other suggestions


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