WordPress - Convert brazilian real in dollar

usd_to_brl.php

<?php
/**
 * USD to BRL
 * API Docs: https://olinda.bcb.gov.br/olinda/servico/PTAX/versao/v1/aplicacao#!/recursos
 * https://olinda.bcb.gov.br/olinda/servico/PTAX/versao/v1/aplicacao#!/recursos/CotacaoDolarDia#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
 * https://olinda.bcb.gov.br/olinda/servico/PTAX/versao/v1/odata/CotacaoDolarDia(dataCotacao=@dataCotacao)?@dataCotacao=%2706-08-2021%27&$top=100&$format=json&$select=cotacaoCompra,cotacaoVenda,dataHoraCotacao
 *
 * @param float $value BRL value to convert
 * @param string $type 'cotacaoCompra' or 'cotacaoVenda'
 *
 * @return string
 *
 * Usage: echo wp_brl_to_usd(1);
 */

function wp_brl_to_usd(float $value, string $type = 'cotacaoVenda'){
	$last_day = date('m-d-Y', strtotime("-1 days"));
	$top      = $select = $format = "";
	$api      = "https://olinda.bcb.gov.br/olinda/servico/PTAX/versao/v1/odata/CotacaoDolarDia(dataCotacao=@dataCotacao)?@dataCotacao='$last_day'&$top=100&$format=json&$select=cotacaoCompra,cotacaoVenda,dataHoraCotacao";
	$get_data = json_decode(
		wp_remote_retrieve_body(
			wp_remote_request($api, ['method' => 'GET', 'timeout' => 120])
		), true
	);
	$usd      = (float) $get_data['value'][0][$type];

	return number_format(round($usd * $value, 2), 2);
}