Advanced date filtering with multiple future date variables

Hi there!

Great idea on the hook. Here’s what I came up with- I merged all four date fields into an array but it still throws an error- says the $events variable at the beginning of the array_filter line is unexpected. I thought maybe combining all the dates and comparing them directly would avoid creating a new field and then sorting by that field.

Can you take a look and see what’s going on here and if I have this basic concept down correctly?

Thanks to @servicethinker for the original idea as posted here: Auto Sort and Auto Filter An Structured Event. My events and the dates are not in a structure field, but I took the basic concept as inspiration.


// Sorting events structure field by next future date
kirby()->hook('', function($page) {
  if(isset($page->content()->data['events'])) {
    $events = $page('events')->children();
    $end_date = $page('events')->end_date();
    $addl_end_date1 = $page('events')->addl_end_date1();
    $addl_end_date2 = $page('events')->addl_end_date2();
    $addl_end_date3 = $page('events')->addl_end_date3();
    // Merge all possible date fields into one array
    $alldates = array_merge($end_date, $addl_end_date1, $addl_end_date2, $addl_end_date3)
    // Filtering expired dates
    $events = array_filter($events, function($k) {
      $today = date("Y-m-d");
      return strcmp($k['alldates'], $today) >= 0;
    // Sorting future dates
    usort($events, function($a, $b) {
      return strcmp($a['alldates'], $b['alldates']);
    // Save result
    try {
        'events' => yaml::encode($events)
    catch(Exception $e) {
      echo $e->getMessage();

Thanks for taking a look!