cache_duration() публичный статический Метод

* FeedWordPress::clear_cache ()
public static cache_duration ( $params = [] )
 function fetch($url, $params = array())
 {
     if (is_wp_error($url)) {
         // Let's bounce.
         return $url;
     }
     $force_feed = true;
     // Default
     // Allow user to change default feed-fetch timeout with a global setting. Props Erigami Scholey-Fuller <http://www.piepalace.ca/blog/2010/11/feedwordpress-broke-my-heart.html>			'timeout' =>
     $timeout = FeedWordPress::fetch_timeout();
     if (!is_array($params)) {
         $force_feed = $params;
     } else {
         // Parameter array
         $args = wp_parse_args(array('force_feed' => $force_feed, 'timeout' => $timeout), $params);
         extract($args);
     }
     $timeout = intval($timeout);
     $pie_class = apply_filters('feedwordpress_simplepie_class', 'SimplePie');
     $cache_class = apply_filters('feedwordpress_cache_class', 'WP_Feed_Cache');
     $file_class = apply_filters('feedwordpress_file_class', 'FeedWordPress_File');
     $parser_class = apply_filters('feedwordpress_parser_class', 'FeedWordPress_Parser');
     $sniffer_class = apply_filters('feedwordpress_sniffer_class', 'FeedWordPress_Content_Type_Sniffer');
     $feed = new $pie_class();
     $feed->set_feed_url($url);
     $feed->set_cache_class($cache_class);
     $feed->set_timeout($timeout);
     $feed->set_content_type_sniffer_class($sniffer_class);
     $feed->set_file_class($file_class);
     $feed->set_parser_class($parser_class);
     $feed->force_feed($force_feed);
     $feed->set_cache_duration(FeedWordPress::cache_duration());
     $feed->init();
     $feed->handle_content_type();
     if ($feed->error()) {
         $ret = new WP_Error('simplepie-error', $feed->error());
     } else {
         $ret = $feed;
     }
     return $ret;
 }
 function fetch($url, $force_feed = true)
 {
     $feed = new SimplePie();
     $feed->set_feed_url($url);
     if (version_compare(SIMPLEPIE_VERSION, '1.3-dev', '>')) {
         $feed->set_cache_location('wp-transient');
         $feed->registry->register('Cache', 'WP_Feed_Cache_Transient');
         $feed->registry->register('File', 'FeedWordPress_File');
     } else {
         $feed->set_cache_class('WP_Feed_Cache');
         $feed->set_file_class('FeedWordPress_File');
     }
     $feed->set_content_type_sniffer_class('FeedWordPress_Content_Type_Sniffer');
     $feed->set_file_class('FeedWordPress_File');
     $feed->force_feed($force_feed);
     $feed->set_cache_duration(FeedWordPress::cache_duration());
     $feed->init();
     $feed->handle_content_type();
     if ($feed->error()) {
         $ret = new WP_Error('simplepie-error', $feed->error());
     } else {
         $ret = $feed;
     }
     return $ret;
 }