PHP如何使用第三方支付_PHP集成第三方支付的方法与代码实例

composer require alipaysdk/easysdk

require_once 'vendor/autoload.php';

use Alipay\EasySDK\Kernel\Factory;

Factory::setOptions([
    'app_id' => 'your_app_id',
    'private_key' => 'your_private_key',
    'alipay_public_key' => 'alipay_public_key',
]);

$response = Factory::payment()->page()->pay(
    '订单标题',           // 订单标题
    'OUT_TRADE_NO_001',  // 商户订单号
    '100.00',            // 订单金额
    'https://yourdomain.com/return.php' // 支付完成后跳转地址
);

// 输出表单并自动提交
echo $response->body;

function wechatPay($openid, $outTradeNo, $totalFee, $body) {
    $appid = 'your_appid';
    $mch_id = 'your_mch_id';
    $key = 'your_api_key';
    $notify_url = 'https://yourdomain.com/wechat_notify.php';

    $params = [
        'appid' => $appid,
        'mch_id' => $mch_id,
        'nonce_str' => md5(uniqid(microtime(true), true)),
        'body' => $body,
        'out_trade_no' => $outTradeNo,
        'total_fee' => $totalFee, // 单位：分
        'spbill_create_ip' => $_SERVER['REMOTE_ADDR'],
        'notify_url' => $notify_url,
        'trade_type' => 'JSAPI',
        'openid' => $openid
    ];

    // 生成签名
    ksort($params);
    $string = '';
    foreach ($params as $k => $v) {
        if ($v !== '' && $k != 'sign') {
            $string .= "{$k}={$v}&";
        }
    }
    $string .= "key={$key}";
    $params['sign'] = strtoupper(md5($string));

    // 转为XML
    $xml = '<xml>';
    foreach ($params as $k => $v) {
        $xml .= "<{$k}>{$v}</{$k}>";
    }
    $xml .= '</xml>';

    // 请求微信统一下单接口
    $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    $result = curl_exec($ch);
    curl_close($ch);

    return simplexml_load_string($result, 'SimpleXMLElement', LIBXML_NOCDATA);
}

$notify_data = $_POST;

// 验证签名
$flag = verifyAlipaySign($notify_data); // 使用支付宝公钥验签

if ($flag && $notify_data['trade_status'] == 'TRADE_SUCCESS') {
    // 更新本地订单状态
    updateOrderStatus($notify_data['out_trade_no'], 'paid');

    echo 'success'; // 必须原样返回success，否则会重复通知
} else {
    echo 'fail';
}

$input = file_get_contents('php://input');
$data = simplexml_load_string($input, 'SimpleXMLElement', LIBXML_NOCDATA);

if ($data && $data->return_code == 'SUCCESS') {
    // 验证签名
    if (wechatVerifySign($data)) {
        // 处理订单逻辑
        updateOrderStatus((string)$data->out_trade_no, 'paid');
        echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';
    }
}