Morilog\Jalali\jDateTime::d2g PHP Method

    public static function d2g($jdn)
    {
        $j = 4 * $jdn + 139361631;
        $j += self::div(self::div(4 * $jdn + 183187720, 146097) * 3, 4) * 4 - 3908;
        $i = self::div(self::mod($j, 1461), 4) * 5 + 308;
        $gd = self::div(self::mod($i, 153), 5) + 1;
        $gm = self::mod(self::div($i, 153), 12) + 1;
        $gy = self::div($j, 1461) - 100100 + self::div(8 - $gm, 6);
        return [$gy, $gm, $gd];
    }