PHP 7.4 implementation of the temporary change to VAT rates in Germany

konjunktur_u_zukunftspaket.php

<?php
declare(strict_types=1);

// Here is a simple implementation in PHP 7.4 of the temporary change to VAT rates in Germany.

use DateTime;
use DateTimeZone;

/**
 * Between July 1, 2020 and December 31, 2020 the VAT in Germany
 * will sink from 19% to 16% (standard rate) and 7% to 5% (reduced rate).
 *
 * Source: https://tinyurl.com/y79lmh5f
 */

$tz  = new DateTimeZone('Europe/Berlin');
$now = new DateTime('now', $tz);
$min = new DateTime('July 1, 2020 00:00:00', $tz);
$max = new DateTime('December 31, 2020 23:59:59', $tz);

if (in_range($now->getTimestamp(), $min->getTimestamp(), $max->getTimestamp(), true)) {
    $data['DE'] = [
        'vat_rate_standard' => 16.0,
        'vat_rate_reduced'  => 5.0,
    ];
}

// where "$data" is an array of VAT data as specified at https://euvatrates.com/rates.json and "in_range" is defined as:

/**
 * Return true, if passed integer is in the range [min..max]
 *
 * @param int  $int
 * @param int  $min
 * @param int  $max
 * @param bool $inclusive
 *
 * @return bool
 */
function in_range(int $int, int $min, int $max, bool $inclusive = false): bool
{
    if ($inclusive) {
        return $int >= $min && $int <= $max;
    }

    return $int > $min && $int < $max;
}