Mage_Connect_Packager::getRemoteModifiedFiles PHP Method

    public function getRemoteModifiedFiles($chanName, $package, $cacheObj, $ftp)
    {
        $p = $cacheObj->getPackageObject($chanName, $package);
        $hashContents = $p->getHashContents();
        $listModified = array();
        foreach ($hashContents as $file => $hash) {
            $localFile = uniqid("temp_remote_");
            if (!$ftp->fileExists($file)) {
                continue;
            }
            $ftp->get($localFile, $file);
            if (file_exists($localFile) && md5_file($localFile) !== $hash) {
                $listModified[] = $file;
            }
            @unlink($localFile);
        }
        return $listModified;
    }