Method of WeChat payment on PHP APP

This article mainly introduces the method of WeChat payment on the PHP APP. It has a certain reference value. Now I share it with you. Friends in need can refer to it.

I have already written about mobile APP Alipay payment. , today I will add the mobile APP WeChat Pay. I won’t go into details about the preliminary preparations here. You can refer to the WeChat Pay development documents. Be sure to read the development documents carefully to avoid pitfalls. After the preparations are completed, it is time to configure. Parameters, call the unified ordering interface, and asynchronous callback after payment;

1. I encapsulated a payment class file, removed the redundant things, and put the configuration parameters into this payment In the class, you only need to modify a few parameters in the Weixinpayandroid method and you can directly copy and use:

class Wxpayandroid
{
    //参数配置
    public $config = array(
                'appid' => "",    /*微信开放平台上的应用id*/
                'mch_id' => "",   /*微信申请成功之后邮件中的商户id*/
                'api_key' => "",    /*在微信商户平台上自己设定的api密钥 32位*/
            );
    
    //服务器异步通知页面路径(必填)
    public $notify_url = '';
    
    //商户订单号(必填，商户网站订单系统中唯一订单号)
    public $out_trade_no = '';

    //商品描述(必填，不填则为商品名称)
    public $body = '';
    
    //付款金额(必填)
    public $total_fee = 0;
    
    //自定义超时(选填，支持dhmc)
    public $time_expire = '';
    
    private $WxPayHelper;
    
    public function Weixinpayandroid($total_fee,$tade_no)
    {
        $this->total_fee = intval($total_fee * 100);//订单的金额 1元
        $this->out_trade_no = $tade_no;// date('YmdHis') . substr(time(), - 5) . substr(microtime(), 2, 5) . sprintf('%02d', rand(0, 99));//订单号
        $this->body = 'wxpay';//支付描述信息
        $this->time_expire = date('YmdHis', time() + 86400);//订单支付的过期时间(eg:一天过期)
        $this->notify_url = "http://www.ceshi.com/notifyandroid";//异步通知URL(更改支付状态)
        //数据以JSON的形式返回给APP
        $app_response = $this->doPay();  
        if (isset($app_response['return_code']) && $app_response['return_code'] == 'FAIL') {
            $errorCode = 100;
            $errorMsg = $app_response['return_msg'];
            $this->echoResult($errorCode, $errorMsg);
        } else {
            $errorCode = 0;
            $errorMsg = 'success';
            $responseData = array(
                'notify_url' => $this->notify_url,
                'app_response' => $app_response,
            );
            $this->echoResult($errorCode, $errorMsg, $responseData);
        }
    }
    
    //接口输出
    function echoResult($errorCode = 0, $errorMsg = 'success', $responseData = array())
    {
        $arr = array(
            'errorCode' => $errorCode,
            'errorMsg' => $errorMsg,
            'responseData' => $responseData,
        );
         exit(json_encode($arr));      //exit可以正常发送给APP json数据
        // return json_encode($arr);  //在TP5中return这个json数据，APP接收到的是null,无法正常吊起微信支付
    }
    
    function getVerifySign($data, $key) 
    {
        $String = $this->formatParameters($data, false);
        //签名步骤二：在string后加入KEY
        $String = $String . "&key=" . $key;
        //签名步骤三：MD5加密
        $String = md5($String);
        //签名步骤四：所有字符转为大写
        $result = strtoupper($String);
        return $result;
    }
    
    function formatParameters($paraMap, $urlencode) 
    {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v) {
            if($k=="sign"){
                continue;
            }
            if ($urlencode) {
                $v = urlencode($v);
            }
            $buff .= $k . "=" . $v . "&";
        }
        $reqPar;
        if (strlen($buff) > 0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;
    }
    
    /**
     * 得到签名
     * @param object $obj
     * @param string $api_key
     * @return string
     */
    function getSign($obj, $api_key)
    {
        foreach ($obj as $k => $v)
        {
            $Parameters[strtolower($k)] = $v;
        }
        //签名步骤一：按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters, false);
        //签名步骤二：在string后加入KEY
        $String = $String."&key=".$api_key;
        //签名步骤三：MD5加密
        $result = strtoupper(md5($String));
        return $result;
    }
    
    /**
     * 获取指定长度的随机字符串
     * @param int $length
     * @return Ambigous <NULL, string>
     */
    function getRandChar($length){
       $str = null;
       $strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
       $max = strlen($strPol)-1;
       for($i=0;$i<$length;$i++){
            $str.=$strPol[rand(0,$max)];//rand($min,$max)生成介于min和max两个数之间的一个随机整数
       }
       return $str;
    }
    
    /**
     * 数组转xml
     * @param array $arr
     * @return string
     */
    function arrayToXml($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; 
    }
    
    /**
     * 以post方式提交xml到对应的接口url
     *
     * @param string $xml  需要post的xml数据
     * @param string $url  url
     * @param bool $useCert 是否需要证书，默认不需要
     * @param int $second   url执行超时时间，默认30s
     * @throws WxPayException
     */
    function postXmlCurl($xml, $url, $second=30, $useCert=false, $sslcert_path=&#39;&#39;, $sslkey_path=&#39;&#39;)
    {
        $ch = curl_init();
        //设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        curl_setopt($ch,CURLOPT_URL, $url);
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
    
        if($useCert == true){
            curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,TRUE);
            curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,2);//严格校验
            //设置证书
            //使用证书：cert 与 key 分别属于两个.pem文件
            curl_setopt($ch,CURLOPT_SSLCERTTYPE,&#39;PEM&#39;);
            curl_setopt($ch,CURLOPT_SSLCERT, $sslcert_path);
            curl_setopt($ch,CURLOPT_SSLKEYTYPE,&#39;PEM&#39;);
            curl_setopt($ch,CURLOPT_SSLKEY, $sslkey_path);
        }
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        //运行curl
        $data = curl_exec($ch);
         
        //返回结果
        if($data){
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
    
            curl_close($ch);
            return false;
        }
    }
    
    /**
     * 获取当前服务器的IP
     * @return Ambigous <string, unknown>
     */
    function get_client_ip()
    {
        if (isset($_SERVER[&#39;REMOTE_ADDR&#39;])) {
            $cip = $_SERVER[&#39;REMOTE_ADDR&#39;];
        } elseif (getenv("REMOTE_ADDR")) {
            $cip = getenv("REMOTE_ADDR");
        } elseif (getenv("HTTP_CLIENT_IP")) {
            $cip = getenv("HTTP_CLIENT_IP");
        } else {
            $cip = "127.0.0.1";
        }
        return $cip;
    }
 
    /**
     * 将数组转成uri字符串
     * @param array $paraMap
     * @param bool $urlencode
     * @return string
     */
    function formatBizQueryParaMap($paraMap, $urlencode)
    {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v)
        {
            if($urlencode)
            {
               $v = urlencode($v);
            }
            $buff .= strtolower($k) . "=" . $v . "&";
        }
        $reqPar;
        if (strlen($buff) > 0) 
        {
            $reqPar = substr($buff, 0, strlen($buff)-1);
        }
        return $reqPar;
    }
    
    /**
     * XML转数组
     * @param unknown $xml
     * @return mixed
     */
    function xmlToArray($xml) 
    {
        //将XML转为array
        $array_data = json_decode(json_encode(simplexml_load_string($xml, &#39;SimpleXMLElement&#39;, LIBXML_NOCDATA)), true);
        return $array_data;
    }
    public function chkParam() 
    {
        //用户网站订单号
        if (empty($this->out_trade_no)) {
            die(&#39;out_trade_no error&#39;);
        }   
        //商品描述
        if (empty($this->body)) {
            die(&#39;body error&#39;);
        }
        if (empty($this->time_expire)){
            die(&#39;time_expire error&#39;);
        }
        //检测支付金额
        if (empty($this->total_fee) || !is_numeric($this->total_fee)) {
            die(&#39;total_fee error&#39;);
        }
        //异步通知URL
        if (empty($this->notify_url)) {
            die(&#39;notify_url error&#39;);
        }
        if (!preg_match("#^http:\/\/#i", $this->notify_url)) {
            $this->notify_url = "http://" . $_SERVER[&#39;HTTP_HOST&#39;] . $this->notify_url;
        }
        return true;
    }
    
    /**
     * 生成支付(返回给APP)
     * @return boolean|mixed
     */
    public function doPay() {
        //检测构造参数
        $this->chkParam();
        return $this->createAppPara();
    }
    
    /**
     * APP统一下单
     */
    private  function createAppPara() 
    {
        $url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
        
        $data["appid"]        = $this->config[&#39;appid&#39;];//微信开放平台审核通过的应用APPID
        $data["body"]         = $this->body;//商品或支付单简要描述
        $data["mch_id"]       = $this->config[&#39;mch_id&#39;];//商户号
        $data["nonce_str"]    = $this->getRandChar(32);//随机字符串
        $data["notify_url"]   = $this->notify_url;//通知地址
        $data["out_trade_no"] = $this->out_trade_no;//商户订单号
        $data["spbill_create_ip"] = $this->get_client_ip();//终端IP
        $data["total_fee"]        = $this->total_fee;//总金额
        $data["time_expire"]      = $this->time_expire;//交易结束时间
        $data["trade_type"]       = "APP";//交易类型
        $data["sign"]             = $this->getSign($data, $this->config[&#39;api_key&#39;]);//签名
        $xml        = $this->arrayToXml($data);
        $response   = $this->postXmlCurl($xml, $url);
        //将微信返回的结果xml转成数组
        $responseArr = $this->xmlToArray($response);
        if(isset($responseArr["return_code"]) && $responseArr["return_code"]==&#39;SUCCESS&#39;){
            return  $this->getOrder($responseArr[&#39;prepay_id&#39;]);
        }
        return $responseArr;
    }
    
    /**
     * 执行第二次签名，才能返回给客户端使用
     * @param int $prepayId:预支付交易会话标识
     * @return array
     */
    public function getOrder($prepayId)
    {
        $data["appid"]      = $this->config[&#39;appid&#39;];
        $data["noncestr"]   = $this->getRandChar(32);
        $data["package"]    = "Sign=WXPay";
        $data["partnerid"]  = $this->config[&#39;mch_id&#39;];
        $data["prepayid"]   = $prepayId;
        $data["timestamp"]  = time();
        $data["sign"]       = $this->getSign($data, $this->config[&#39;api_key&#39;]);
        $data["packagestr"] = "Sign=WXPay";
        return $data;
    }
    
    /**
     * 异步通知信息验证
     * @return boolean|mixed
     */
    public function verifyNotify()
    {
        $xml = isset($GLOBALS[&#39;HTTP_RAW_POST_DATA&#39;]) ? $GLOBALS[&#39;HTTP_RAW_POST_DATA&#39;] : &#39;&#39;;  
        if(!$xml){
            return false;
        }
        $wx_back = $this->xmlToArray($xml);
        if(empty($wx_back)){
            return false;
        }
        $checkSign = $this->getVerifySign($wx_back, $this->config[&#39;api_key&#39;]);     
        if($checkSign=$wx_back[&#39;sign&#39;]){
            return $wx_back;
        }else{
            return false;
        }   
    }
}　　

2. Create a controller to define a unified ordering interface and an asynchronous callback interface after payment:

vendor('Wxpayandroid');//引入支付类
class Wxpayandroid extends Controller 
{
//异步通知接口
    public function notifyandroid()
    {
        $wxpayandroid = new \Wxpayandroid;     //实例化微信支付类
        $verify_result = $wxpayandroid->verifyNotify(); 
        if ($verify_result['return_code']=='SUCCESS' && $verify_result['result_code']=='SUCCESS') {
        　　//商户订单号
        　　$out_trade_no = $verify_result['out_trade_no'];
        　　//交易号
        　　$trade_no     = $verify_result['transaction_id'];
        　　//交易状态
        　　$trade_status = $verify_result['result_code'];
        　　//支付金额
        　　$total_fee    = $verify_result['total_fee']/100;
        　　//支付过期时间
        　　$pay_date     = $verify_result['time_end'];
        　　$order = new Order();
        　　$ret = $order->getOrderN2($out_trade_no); //获取订单信息
        　　$total_amount=$ret['money'];
        　　if ($total_amount==$total_fee) {
            　　// 验证成功 修改数据库的订单状态等 $result['out_trade_no']为订单号
            　　//此处写自己的逻辑代码
        　　}
            exit(&#39;<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>&#39;);
        }else{
            exit(&#39;<xml><return_code><![CDATA[FAIL]]></return_code><return_msg><![CDATA[ERROR]]></return_msg></xml>&#39;);
        }
    }

    //调用统一下单接口生成预支付订单并把数据返回给APP
    public function wxpayandroid(Request $request)
    {
        $param = $request->param(); //接收值

        $tade_no = $param[&#39;orderCode&#39;];
        $order = new Order();   //实例化订单
        $ret = $order->getOrderN2($tade_no);  //查询订单信息
        $total_fee = $ret[&#39;money&#39;]; //订单总金额
        
        $wxpayandroid = new \Wxpayandroid;     //实例化微信支付类
        $res = $wxpayandroid->Weixinpayandroid($total_fee,$tade_no);    //调用weixinpay方法
    }
}

Encapsulate a payment class file, put the configuration parameters into the payment class, and then define the controller to create two methods, so that in two steps you can The mobile APP WeChat payment is ready.

The above is the entire content of this article. I hope it will be helpful to everyone's study. For more related content, please pay attention to the PHP Chinese website!

Related recommendations:

PHPExcel method of importing Excel data

Introduction to using openssl to replace mcrypt in PHP7.1

The above is the detailed content of Method of WeChat payment on PHP APP. For more information, please follow other related articles on the PHP Chinese website!