How to use Flickr with Zend Framework?

$flirktag = "php, mysql"

$frontendOptions = array(
    'lifetime' => 600,                   // cache lifetime of 10 minute
    'automatic_serialization' => false  // this is the default anyways
);
$backendOptions = array('cache_dir' => MYAPP_PATH_DATA);
$cache = Zend_Cache::factory('Output', 'File', $frontendOptions, $backendOptions);

if(!$flickrPlugin = $cache->load("flickr".md5($flirktag))) {
    $flickrPlugin = "";
    $flickr = new Zend_Service_Flickr('###YOUR#ID###');
    $options = array(
        'per_page' => 5,
        'page'     => 1,
        'tag_mode' => 'all',
        'extras'   => 'license, date_upload, date_taken, owner_name, icon_server'
        );
    $tags = explode(", ", $flirktag);
    $flickr_results = $flickr->tagSearch($tags, $options);

    if (count($result) > 0){
        $flickrPlugin .= '<div class="flickr section"><ul class="gallery">';
        foreach ($flickr_results as $flickr_result) {
            if ($flickr_result->title == ""){
                $title = $result->flickr;
            }else{
                $substring = strtolower(substr($flickr_result->title, -4));
                if ($substring == ".jpg" or $substring == ".gif" or $substring == ".png"){
                    $title = $result->flickr;
                }else{
                    $title = $flickr_result->title;
                }
            }
            $flickrPlugin .= '<li><a rel="lightbox-tour" href="'.$flickr_result->Medium->uri.'" title="'.$flickr_result->title.'"><img class="thumb" src="'.$flickr_result->Square->uri.'" /></a></li>';
        }
    $flickrPlugin .= '</ul></div>';
}

    $cache->save($flickrPlugin, "flickr".md5($flirktag));
    print ($flickrPlugin);