<?php
// 微信企业付款API请求数据
$data = [
    'mch_appid' => 'your_app_id', // 商户账号appid
    'mchid' => 'your_mch_id', // 商户号
    'nonce_str' => uniqid(), // 随机字符串
    'partner_trade_no' => 'your_trade_no', // 商户订单号
    'openid' => 'recipient_openid', // 用户openid
    'check_name' => 'NO_CHECK', // 校验用户姓名选项
    'amount' => 100, // 付款金额，单位分
    'desc' => '付款描述信息', // 企业付款描述信息
    'spbill_create_ip' => $_SERVER['SERVER_ADDR'] ?? '127.0.0.1' // 调用接口的机器Ip地址
];

// 生成签名
$apiKey = 'your_api_key'; // API密钥
ksort($data);
$signString = urldecode(http_build_query($data)) . "&key=" . $apiKey;
$data['sign'] = strtoupper(md5($signString));

// 转换为XML格式
$xmlData = arrayToXml($data);

$ch = curl_init('https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers');
if ($ch === false) {
    die('cURL初始化失败');
}

curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xmlData);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/xml',
    'Content-Length: ' . strlen($xmlData)
]);

// SSL证书设置 - 使用更兼容的设置
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);

// 检查CA证书文件是否存在，如果不存在则禁用验证（仅开发环境）
$caFile = 'D:\phpstudy_pro\Extensions\curl\cacert.pem';
if (file_exists($caFile)) {
    curl_setopt($ch, CURLOPT_CAINFO, $caFile);
} else {
    // 开发环境警告
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    error_log('警告: CA证书文件未找到，SSL验证已禁用');
}

// 如果有证书文件，需要设置以下两项
// curl_setopt($ch, CURLOPT_SSLCERT, '/path/to/your/apiclient_cert.pem');
// curl_setopt($ch, CURLOPT_SSLKEY, '/path/to/your/apiclient_key.pem');

$response = curl_exec($ch);
if ($response === false) {
    echo 'cURL Error: ' . curl_error($ch) . "\n";
    echo 'cURL Error Code: ' . curl_errno($ch) . "\n";
} else {
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    echo "HTTP状态码: " . $httpCode . "\n";
    echo "响应内容:\n";
    var_dump($response);
}
curl_close($ch);

/**
 * 数组转XML
 */
function arrayToXml($arr) {
    $xml = "<xml>";
    foreach ($arr as $key => $val) {
        if (is_numeric($val)) {
            $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
        } else {
            $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
        }
    }
    $xml .= "</xml>";
    return $xml;
}