Doctrine\ODM\CouchDB\Tools\Console\Command\UpdateDesignDocCommand::isMissingOrDifferent PHP Method

    private function isMissingOrDifferent($local, $remote)
    {
        if (is_null($remote) || isset($remote['error']) && $remote['error'] == 'not_found') {
            return true;
        }
        foreach ($local as $key => $val) {
            if (!isset($remote[$key]) || $remote[$key] != $val) {
                return true;
            }
            unset($remote[$key]);
        }
        // If any items remain (excluding _id and _rev) the remote is different.
        if (count($remote) > 2) {
            return true;
        }
        return false;
    }