Kwai applet guaranteed payment PHP source code packaging

Tiktok guarantees payment , Although some people in the official community forum have sorted out and shared some of the source code , But not all , I resealed it here , And integrate the entry , refund 、 Query methods

<?php
    /**
     *  Kwai payment 
     */
    class KspayService
    {
        protected $appid;
        protected $appSecret;
        public $data = null;
        public function __construct($appid, $appSecret)
        {
            $this->appid = $appid; // Applet APPID
            $this->appSecret = $appSecret; // Applet appsecret
        }
        /**
         *  Get user's information through Jump openid, The jump process is as follows ：
         * @return  User openid
         */
        public function getOpenid($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 " Acquisition failure ";
                }
            }else{
                echo " Parameter error ";
            }
        }

        /**
         *  obtain 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'];
        }

        /**
         *  Generate signature 
         *  @return  Signature 
         */
        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);
        }
        /**
         *  Advance order 
         * @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, // The order number 
                'total_amount' => $price,  // amount of money   Company : branch 
                'detail' => $body,         // Content of payment 
                'subject' => $subject,     // Title of payment 
                '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);
        }
        /**
         *  Order and settlement 
         * @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' =>' The user applies for settlement ',// Reason for refund 
                '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);
        }
        /**
         *  Order inquiry 
         * @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);
        }
        /**
         *  refund 
         * @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' =>' Users apply for a refund ',// Reason for refund 
        		'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($curl, CURLOPT_TIMEOUT, 2); // Timeout time 2 second 
            curl_setopt($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, $options);
            }
            //https request   Do not verify certificates and host
            curl_setopt($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); // Set up cURL The maximum number of seconds allowed to execute 
            if (!empty($options)) {
                curl_setopt_array($ch, $options);
            }
            //https request   Do not verify certificates and host
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
            $data = curl_exec($ch);
            curl_close($ch);
            return $data;
        }
    }
?>

Callback ：（ The callback of Kwai payment does not need to do any processing on the returned parameters , That is, there is no need to sort 、 assemble , Directly joining together appsecret then md5 that will do ）

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

if(true){
    // Complete your logic 
    $orderid = $result['data']['out_order_no'];
    if($result['data']['status'] == 'SUCCESS'){
        $appSecret = '';   // Your appsecret
        $resulta = json_encode($result);
        $notify = md5($resulta.$appSecret);
        if($notify == $kwaisign){
            // Check success , Update your database 
            
            // Below is the fixed return format 
            $res = [
                'result'=>1,
                'message_id'=>$result['message_id']
            ];
            echo json_encode($res);
        }else{
            echo 'Signature error';
        }
    }
}else{
    echo 'pay error';
}

The payment code on the applet side is no longer sent , Relatively simple , You can contact me if you need , It should be noted that , The entry of Kwai applet needs to be processed one by one according to the order number , This is bullshit , I don't know if it will be adjusted later

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