Функция склонения слов

function declension($int, $expressions, $showint = true) {
    settype($int, "integer");
    $count = $int % 100;
    if ($count >= 5 && $count <= 20) {
        $result = ($showint? $int." ":"").$expressions['2'];
    } else {
        $count = $count % 10;
        if ($count == 1) {
            $result = ($showint? $int." ":"").$expressions['0'];
        } elseif ($count >= 2 && $count <= 4) {
            $result = ($showint? $int." ":"").$expressions['1'];
        } else {
            $result = ($showint? $int." ":"").$expressions['2'];
        }
    }
    return $result;
}

echo 'Ваш заказ на '.price_format($total_price).' '.declension($total_price, array('рубль', 'рубля','рублей'), false).'.';