환율 API 사용 예제

// https://exchangerate.host/dashboard
// 환율 정보를 가져올 통화 목록에 KRW 추가
$currencies = "USD,EUR,JPY,AUD,CAD,KRW,CNY,GBP,NZD,THB,VND,HKD,TWD";

// 액세스 키
$access_key = "YOUR_ACCESS_KEY";

// API 호출 URL
$url = "http://api.exchangerate.host/live?access_key=$access_key¤cies=$currencies&format=1";

// cURL 사용
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// 응답 받기
$response = curl_exec($ch);
curl_close($ch);

// JSON 파싱
$data = json_decode($response, true);

if (isset($data['success']) && $data['success'] === true) {
    $usdkrw = $data['quotes']['USDKRW'];
    $krw1000_in_usd = 1000 / $usdkrw;
    $usd_formatted = number_format($krw1000_in_usd, 6);

    foreach ($data['quotes'] as $pair => $rate) {
        $currency = substr($pair, 3);
        $converted = $krw1000_in_usd * $rate;
        $formatted = number_format($converted, 4);
        $krw_value = $usdkrw / $rate;
        echo "$currency: $rate >> KRW(1,000): $formatted";
    }
} else {
    echo "환율 데이터를 가져오는 데 실패했습니다.";
}