Zend_Service_Flickr allows to retrieve a group's pool photos
based on the group ID. Use the groupPoolGetPhotos() method:
Example 802. Retrieving a Group's Pool Photos by Group ID
<?php
$flickr = new Zend_Service_Flickr('MY_API_KEY');
$results = $flickr->groupPoolGetPhotos($groupId);
foreach ($results as $result) {
echo $result->title . '<br />';
}
Optional parameter
groupPoolGetPhotos() accepts an optional second parameter
as an array of options.