Horde_ActiveSync_SyncCache::getFolder PHP Method

    public function getFolder($folder)
    {
        return !empty($this->_data['folders'][$folder]) ? $this->_data['folders'][$folder] : false;
    }

 /**
  * Validate and perform some sanity checks on the hierarchy changes before
  * being sent to the client.
  *
  * @param Horde_ActiveSync_Connector_Exporter_FolderSync $exporter  The exporter.
  * @param array $seenFolders                             An array of folders.
  */
 public function validateHierarchyChanges(Horde_ActiveSync_Connector_Exporter_FolderSync $exporter, array $seenFolders)
 {
     if ($this->_as->device->version < Horde_ActiveSync::VERSION_TWELVEONE || count($exporter->changed)) {
         return;
     }
     // Remove unnecessary changes.
     foreach ($exporter->changed as $key => $folder) {
         if (isset($folder->serverid) && ($syncFolder = $this->_cache->getFolder($folder->serverid) && in_array($folder->serverid, $seenfolders) && $syncFolder['parentid'] == $folder->parentid && $syncFolder['displayname'] == $folder->displayname && $syncFolder['type'] == $folder->type)) {
             $this->_logger->info(sprintf('[%s] Ignoring %s from changes because it contains no changes from device.', $this->_procid, $folder->serverid));
             unset($exporter->changed[$key]);
             $exporter->count--;
         }
     }
     // Remove unnecessary deletions.
     foreach ($exporter->deleted as $key => $folder) {
         if (($sid = array_search($folder, $seenfolders)) === false) {
             $this->_logger->info(sprintf('[%s] Ignoring %s from deleted list because the device does not know it', $this->_procid, $folder));
             unset($exporter->deleted[$key]);
             $exporter->count--;
         }
     }
 }