amr ical events widget “Ungültige Ical URL” [closed]

Question

I'm using the widget from "amr ical events" plugin. After updating my plugins, the widget now outputs the following error:

Ungültige Ical URL http://www.ec-nordheide.de/?ical

Note: the php validation functon does not cope with internationalised domain, please contact the developer if this affects you.

I tried a bit with the URL, if I delete the hyphen, the error disappears (but the file can't be found anymore) ... what do I do?

Answer 1

Ok, so I found a workaround. I commented out some code in the amr-ical-events-list-main.php:

//  if ((function_exists('filter_var')) and (!filter_var($v, FILTER_VALIDATE_URL))) { /* rejecting a valid URL on php 5.2.14  */
//    echo '<h2>'.sprintf(__('Invalid Ical URL %s','amr-ical-events-list'), $v).'</h2>';
//    echo '<p>Note: the php validation functon does not cope with internationalised domain, please contact the developer if this affects you.</p>';
//  }
//  else
      $shortcode_params['urls'][$i] = esc_url_raw($v);

Now the error message has disappeared (of course I literally commented it out) and the iCal URL is computed correctly, the contents are displayed by the widget.

This means beforehand the filter_var function returned that the URL is invalid, does somebody know this function? Why would it do that?