php code for getting BYN to USD rate

php_getNBRBRateCURL

<?php
$connection = curl_init();
$currency = 'USD'; // parammode=2 – по буквенному коду валюты (ИСО 4217)
$date = '2021-07-01';
$url = "https://www.nbrb.by/api/exrates/rates/$currency?parammode=2&ondate=$date";
curl_setopt( $connection, CURLOPT_URL, $url );
curl_setopt( $connection, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt( $connection, CURLOPT_TIMEOUT, 15 );
$result = curl_exec( $connection );
$response = json_decode( $result, true );
if(!$response){
    echo '<p style="color:red">Error with curl for '.$url.': '. curl_error($connection).'</p>';
}
else{
    echo (double) $response['Cur_OfficialRate'];
}
curl_close( $connection );