Why does the WebAPI doMyContact method return an empty table?

Question

PHP

allegro.pl/webapi/documentation.php/show/id,1177
My code:

$contacts = $client->call(
  'doMyContact',
  array(
    array(
      'sessionHandle' => $session['sessionHandlePart'],
      'auctionIdList' => array(/*auction id*/),
      'offset' => 0
    )
  )
);
if (isset($contacts['faultcode']) && isset($contacts)) {
  echo 'fault code: ' . $contacts['faultcode'] . ' <br/>';
  echo 'fault string: ' . $contacts['faultstring'] . ' <br/>';
} else if (isset($contacts)) {
  var_dump($contacts); //array(1) { ["mycontactList"]=> string(0) "" } !!!
}

According to the example from the site:
allegro.pl/webapi/tutorials.php/tutorial/id,261

if (isset($contacts['mycontactList']['item'])) {
  foreach ($contacts['mycontactList']['item'] as $row) {
    $myContacts[$row['contact-user-id']] = $row;
  }
}

The method should return a table with nested tables, but will only return an empty table.
Everything is fine with authorization, everything works fine for another method.

Answer 1

Based on this unanswered post from a year ago, the doMyContact method simply doesn't work. And this one works:

$contacts = $client->call(
  'doGetPostBuyData',
  array(
      'parameters' => array(
      'sessionHandle' => $session['sessionHandlePart'],
          'itemsArray' => array(
      	    'item' => array(/*auction id*/)
    )
      )
  )
);

Maybe someone will come in handy, although I doubt it.