Hi All!
I was upgrading from v2.6 maybe to v 13.something. All seemed to be going well and then when I visit the site it gives me the below error:-

Fatal error: Can't use function return value in write context in /var/www/web/piwigo/include/functions.inc.php on line 602

    $details['sync'] = true;
  }

  if ('tag' == $object and 'delete' == $action and isset($_POST['destination_tag']))
  {
    $details['action'] = 'merge';
    $details['destination_tag'] = $_POST['destination_tag'];
  }

  $inserts = array();
  $details_insert = pwg_db_real_escape_string(serialize($details));
  $ip_address = isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : null;
  $session_id = !empty(session_id()) ? session_id() : 'none';                                                 LINE 602

  foreach ($object_ids as $loop_object_id)
  {
    $performed_by = $user['id'] ?? 0; // on a plugin autoupdate, $user is not yet loaded

    if ('logout' == $action)
    {
      $performed_by = $loop_object_id;
    }