Binance Pay：PHP cURL 出现“此请求的签名无效”错误

根据 Binance Pay：PHP cURL 出现“此请求的签名无效”错误

php
// 设置请求URL
$url = "https://api.binancepay.com/api/v1/pay";
// 设置请求参数
$param = [
    "merchantId" => "your_merchant_id",
    "amount" => "10",
    "currency" => "USDT",
    // 其他参数...
];
// 设置密钥和API密钥
$secretKey = "your_secret_key";
$apiKey = "your_api_key";
// 生成签名
ksort($param);
$queryString = http_build_query($param);
$signature = hash_hmac('sha256', $queryString, $secretKey);
// 添加签名到请求参数
$param["signature"] = $signature;
// 添加API密钥到请求头
$headers = [
    "X-Merchant-Apikey: " . $apiKey,
];
// 发送请求
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($param));
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
// 处理响应
$result = json_decode($response, true);
if ($result["code"] == 0) {
    echo "支付成功！";
} else {
    echo "支付失败：" . $result["message"];
}
?>