thinkphp微支付插件

// 引入微信支付类
require_once 'path/to/WxPay.Api.php';
require_once 'path/to/WxPay.Config.php';

// 初始化配置
$config = new WxPayConfig();
$config->setAppId("your_app_id");
$config->setMchId("your_mch_id");
$config->setApiKey("your_api_key");
$config->setNotifyUrl("your_notify_url");

// 实例化微信支付API
$api = new WxPayApi();

// 构造统一下单参数
$input = new WxPayUnifiedOrder();
$input->setBody("商品描述");
$input->setOutTradeNo("unique_order_id");
$input->setTotalFee(100); // 金额，单位为分
$input->setSpbillCreateIp("user_ip");
$input->setTradeType("JSAPI");
$input->setOpenid("user_openid");

// 调用统一下单API
$result = $api->unifiedOrder($config, $input);

if ($result['return_code'] == 'SUCCESS' && $result['result_code'] == 'SUCCESS') {
    // 生成支付参数
    $time_stamp = date('YmdHis');
    $nonce_str = md5(uniqid(microtime(true), true));
    $package = "prepay_id=" . $result['prepay_id'];
    $paySignData = array(
        'appId' => $config->getAppId(),
        'timeStamp' => $time_stamp,
        'nonceStr' => $nonce_str,
        'package' => $package,
        'signType' => 'MD5'
    );
    ksort($paySignData);
    $paySignData['sign'] = http_build_query($paySignData) . '&key=' . $config->getKey();
    $paySign = md5($paySignData['sign']);

    // 生成支付参数JSON
    $payParams = json_encode($paySignData);

    // 输出支付参数
    echo "prepay_id={$result['prepay_id']}&timeStamp={$time_stamp}&nonceStr={$nonce_str}&package={$package}&signType=MD5&paySign={$paySign}";
} else {
    // 支付失败处理
    echo "支付失败，请检查订单信息或重试。";
}