快手小程序担保支付php源码封装

抖音担保支付，虽然官方社区论坛已经有人整理分享了部分源码，但是并不全，我这边重新封装了一下，并且整合了入账，退款、查询等方法

<?php
    /**
     * 快手支付
     */
    class KspayService
    {
        protected $appid;
        protected $appSecret;
        public $data = null;
        public function __construct($appid, $appSecret)
        {
            $this->appid = $appid; //小程序APPID
            $this->appSecret = $appSecret; //小程序的appsecret
        }
        /**
         * 通过跳转获取用户的openid，跳转流程如下：
         * @return 用户的openid
         */
        public function getOpenid($code)
        {
            $url = 'https://open.kuaishou.com/oauth2/mp/code2session';
            $dat = array(
                'app_id' => $this->appid,
                'app_secret' => $this->appSecret,
                'js_code' => $code
            );
            if(isset($code)){
                $res = self::curlPost($url,$dat);
                $data = json_decode($res,true);
                if($data['result'] == 1){
                    $openid = $data['open_id'];
                    return $openid;
                }else{
                    echo "获取失败";
                }
            }else{
                echo "参数错误";
            }
        }

        /**
         * 获取accessToken
         * @return [type] [description]
         */
        public function _getAccessToken() {
            $postData['app_id'] = $this->appid;
            $postData['app_secret'] = $this->appSecret;
            $postData['grant_type'] = 'client_credentials';
            $res = $this->curlPost('https://open.kuaishou.com/oauth2/access_token', $postData);
            $res = json_decode($res, 1);
            return $res['access_token'];
        }

        /**
         * 生成签名
         *  @return 签名
         */
        public function makeSign($query, $postData) {
            unset($query['access_token']);
            $arr = array_merge($query, $postData);
            foreach ($arr as $k => $item) {
                if (empty($item)) {
                    unset($arr[$k]);
                }
            }
            ksort($arr, 2);
            $str = '';
            foreach ($arr as $k => $v) {
                $str .= $k . '=' . $v . '&';
            }
            $str = substr($str, 0, strlen($str) - 1);
            $md5 = $str .$this->appSecret;
            return md5($md5);
        }
        /**
         * 预下单
         * @param  [type] $orderid   [description]
         * @param  [type] $price     [description]
         * @param  [type] $subject   [description]
         * @param  [type] $body      [description]
         * @param  [type] $openid    [description]
         * @param  [type] $notifyUrl [description]
         * @return [type]            [description]
         */
        public function createOrder($orderid,$price,$subject,$body,$openid,$notifyUrl){
            $time = time();
            $price = $price*100;
            $config = [
                'access_token' => $this->_getAccessToken(),
                'app_id' => $this->appid,
            ];
            $data = [
                'open_id' => $openid,
                'out_order_no' =>  $orderid, //订单号
                'total_amount' => $price,  //金额 单位:分
                'detail' => $body,         //支付的内容
                'subject' => $subject,     //支付的标题
                'type' => 1302,
                'expire_time' => 3600,
                'notify_url'=> $notifyUrl,
            ];
            $data['sign'] = $this->makeSign($config,$data);
            $url = 'https://open.kuaishou.com/openapi/mp/developer/epay/create_order?' . http_build_query($config);

            $json = json_encode($data, 320);
            $res = $this->jsonPost($url, $json);
            return json_decode($res,true);
        }
        /**
         * 订单结算
         * @return [type] [description]
         */
        public function settle($orderid,$amount){
            $config = [
                'access_token' => $this->_getAccessToken(),
                'app_id' => $this->appid,
            ];
            $params = [
                'out_order_no'  => $orderid,
                'out_settle_no' => 'js'.$orderid,
                'reason' =>'用户申请结算',//退款理由
                'notify_url' => 'https://'.$_SERVER['HTTP_HOST'].'/jiesuan_notify.php'
            ];
            $params['sign'] = $this->makeSign($config,$params);
            $url = "https://open.kuaishou.com/openapi/mp/developer/epay/settle?". http_build_query($config);
            $json = json_encode($params, 320);
            $res = $this->jsonPost($url, $json);
            return json_decode($res, true);
        }
        /**
         * 订单查询
         * @return [type] [description]
         */
        public function queryOrder($orderid){
        	$config = [
                'access_token' => $this->_getAccessToken(),
                'app_id' => $this->appid,
            ];
        	$params = [
        		'out_order_no'	=> $orderid,
        	];
        	$params['sign'] = $this->makeSign($config,$params);
        	$url = "https://open.kuaishou.com/openapi/mp/developer/epay/query_order?". http_build_query($config);
        	$json = json_encode($params, 320);
            $res = $this->jsonPost($url, $json);
            return json_decode($res, true);
        }
        /**
         * 退款
         * @return [type] [description]
         */
        public function createRefund($orderid,$amount){
        	$config = [
                'access_token' => $this->_getAccessToken(),
                'app_id' => $this->appid,
            ];
        	$params = [
        		'out_order_no'	=> $orderid,
        		'out_refund_no' => 'tk'.$orderid,
        		'reason' =>'用户申请退款',//退款理由
        		'notify_url' => 'https://'.$_SERVER['HTTP_HOST'].'/tk_notify.php',
        		'refund_amount' => $amount,
        	];
        	$params['sign'] = $this->makeSign($config,$params);
        	$url = "https://open.kuaishou.com/openapi/mp/developer/epay/apply_refund?". http_build_query($config);
        	$json = json_encode($params, 320);
            $res = $this->jsonPost($url, $json);
            return json_decode($res, true);
        }

        public function jsonPost($url, $data = NULL, $times = 0) {
            $curl = curl_init();
            curl_setopt($curl, CURLOPT_URL, $url);
            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_TIMEOUT, 2); //超时时间2秒
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
            curl_setopt($curl, CURLOPT_HEADER, 0);
            curl_setopt($curl, CURLOPT_HTTPHEADER, array(
                'Content-Type: application/json; charset=utf-8',
                'Content-Length:' . strlen($data),
                'Cache-Control: no-cache',
                'Pragma: no-cache'
            ));
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
            $res = curl_exec($curl);
            curl_close($curl);
            return $res;
        }

        public static function curlGet($url = '', $options = array())
        {
            $ch = curl_init($url);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_TIMEOUT, 30);
            if (!empty($options)) {
                curl_setopt_array($ch, $options);
            }
            //https请求 不验证证书和host
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
            $data = curl_exec($ch);
            curl_close($ch);
            return $data;
        }
        public function curlPost($url = '', $postData = '', $options = array())
        {
            if (is_array($postData)) {
                $postData = http_build_query($postData);
            }
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
            curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数
            if (!empty($options)) {
                curl_setopt_array($ch, $options);
            }
            //https请求 不验证证书和host
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
            $data = curl_exec($ch);
            curl_close($ch);
            return $data;
        }
    }
?>

回调：（快手支付的回调不需要对返回的参数做任何处理，也就是不需要排序、组装，直接拼接appsecret然后md5即可）

$result = file_get_contents('php://input');
$result = json_decode($result, true);
$kwaisign  = isset($_SERVER['HTTP_KWAISIGN']) ? $_SERVER['HTTP_KWAISIGN'] : '';

if(true){
    //完成你的逻辑
    $orderid = $result['data']['out_order_no'];
    if($result['data']['status'] == 'SUCCESS'){
        $appSecret = '';   //您的appsecret
        $resulta = json_encode($result);
        $notify = md5($resulta.$appSecret);
        if($notify == $kwaisign){
            //校验成功，更新您的数据库
            
            //下边是固定返回格式
            $res = [
                'result'=>1,
                'message_id'=>$result['message_id']
            ];
            echo json_encode($res);
        }else{
            echo 'Signature error';
        }
    }
}else{
    echo 'pay error';
}

小程序端的支付代码不再发，比较简单，有需要可以联系我，需要注意的是，快手小程序的入账需要根据订单号一笔一笔的处理，这点比较扯淡，不知道后期会不会调整

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