PHP开发之微信H5支付

2022-06-10 16:47:31 浏览数 (1)

最近由于业务所需,对接了微信H5支付,然而微信支付对这块并没有现成的demo可用,所以就必须自己老老实实对照开发文档去写咯!但这对于刚接触的童鞋来说,坑多多少少还是有的,所以寻思着把自己的经验分享出来,毕竟现成的用的还是多巴适的嘛!

好了,官方文档的那一套就不多说了,详情见官方文档(https://pay.weixin.qq.com/wiki/doc/api/H5.php?chapter=15_4)

在这里,我主要分成了三个文件:WxPay.Config.php(支付配置文件)、Weixin.class.php(支付类)以及PayMentController.class.php(支付文件)。

首先,WxPay.Config.php配置文件主要包含了商户appId、商户号、商家key、异步回调URL、支付场景信息,如下:

class WxPayConfig

{

public static $appid = '微信支付的公众号appid';

public static $mchid = '微信支付分配的商户号';

public static $key = '微信商户自己设置的安全key';

public static $notify_url = '商户侧接收微信支付异步通知的URL';

public static $scene_info = '{"h5_info":{"type":"Wap","wap_url":" 发起微信H5支付H5的URL","wap_name":"支付"}}';

}

然后,封装Weixin.class.php支付类,主要调用统一下单Api(https://pay.weixin.qq.com/wiki/doc/api/H5.php?chapter=9_20&index=1),这里不多说了,直接上代码:

<?php

require_once "lib/WxPay.Config.php";

class Weixin

{

         /**

     * 微信H5下单付款

     *     @order 付款信息

          *     @bodys 付款内容

     * */

         function getCode($order,$bodys){

                   $url = "https://api.mch.weixin.qq.com/pay/unifiedorder";//微信传参地址

                   //1.获取调用统一下单接口所需必备参数

        $appid =WxPayConfig::$appid;//微信公众号appid

        $mch_id = WxPayConfig::$mchid;//微信支付商户号

        $key = WxPayConfig::$key;//自己设置的微信商家key

        $out_trade_no = $order['order_sn'];//平台内部订单号

        $nonce_str=MD5($out_trade_no);//随机字符串

        $body = $bodys;//付款内容

        $total_fee = $order['order_amount']*100;//付款金额,单位为分

        $spbill_create_ip = getIP(); //获得用户设备IP

        $attach = 'weixinh5';//附加数据(自定义,在支付通知中原样返回)

        $notify_url = WxPayConfig::$notify_url; //异步回调地址,需外网可以直接访问

        $trade_type = 'MWEB';//交易类型,微信H5支付时固定为MWEB

        $scene_info =WxPayConfig::$scene_info;//场景信息

                   //2.将参数按照key=value的格式,并按照参数名ASCII字典序排序生成字符串

        $signA ="appid=$appid&attach=$attach&body=$body&mch_id=$mch_id&nonce_str=$nonce_str&notify_url=$notify_url&out_trade_no=$out_trade_no&scene_info=$scene_info&spbill_create_ip=$spbill_create_ip&total_fee=$total_fee&trade_type=$trade_type";

        //3.拼接字符串

                   $strSignTmp = $signA."&key=$key";

                   //4.MD5加密后转换成大写

        $sign = strtoupper(MD5($strSignTmp));

                   //5.拼接成所需XML格式

        $post_data = "<xml> 

                       <appid>$appid</appid> 

                       <attach>$attach</attach> 

                       <body>$body</body> 

                       <mch_id>$mch_id</mch_id> 

                       <nonce_str>$nonce_str</nonce_str> 

                       <notify_url>$notify_url</notify_url> 

                       <out_trade_no>$out_trade_no</out_trade_no> 

                       <spbill_create_ip>$spbill_create_ip</spbill_create_ip> 

                       <total_fee>$total_fee</total_fee> 

                       <trade_type>$trade_type</trade_type>

                       <scene_info>$scene_info</scene_info>

                       <sign>$sign</sign> 

                   </xml>";

                   //6.以POST方式向微信传参,并取得微信返回的支付参数

        $dataxml = httpRequest($url,'POST',$post_data);

        $objectxml = (array)simplexml_load_string($dataxml, 'SimpleXMLElement', LIBXML_NOCDATA); //将微信返回的XML转换成数组

        return $objectxml;

    }

}

最后,PayMentController.class.php支付文件,支付文件接收前端发起支付的请求并处理后,调用Weixin.class.php支付类并接受结果后返回给前端(此处分享已经去掉接口验证等系列代码逻辑):

public function getPay(){

         //1.引入支付类文件

         include_once "plugins/Payment/weixin/Weixin.class.php";

         $payment = new Weixin();

         $order_id = I('order_id');

         //2.判断参数是否为空

         if (!empty($order_id)){

                   //3.根据订单id查询订单是否存在

                   $order = M('Order')->where(array('id'=>$order_id))->find();

                   if ($order){//订单存在

                            //4.判断该笔订单是否已经支付,如已支付则返回支付失败并给出相应提示

                            if ($order['pay_status'] == '1'){

                                     exit(json_encode(array('status'=>'205','msg'=>'该订单已支付,请勿重复提交!')));

                            }

                            $bodys = '订单:'.$order['order_sn'] . '支付';

                            //5.调用支付类中封装的支付方法并对应传参

                            $result = $payment->getCode($order,$bodys);

                            //6.当return_code和result_code均为SUCCESS,代表下单成功,将支付参数返回

                            if($result['return_code'] == 'SUCCESS'){

                                     if($result['result_code'] == 'SUCCESS'){

                                               exit(json_encode(array('status'=>'0','msg'=>'下单成功,请支付!','result'=>$result['mweb_url'])));

                                     }elseif($result['result_code'] == 'FAIL'){

                                               exit(json_encode(array('status'=>'-201','msg'=>$result['err_code_des'])));

                                     }

                            }else{

exit(json_encode(array('status'=>'-1','msg'=>'未知错误,请稍后重试!')));

                                    }

                   }else{

                            //报错:数据不存在

                            exit(json_encode(array('status'=>'-200','msg'=>'订单不存在,请核实后再提交!')));

                   }

         }else{

                   //报错:缺少参数

                   exit(json_encode(array('status'=>'-204','msg'=>'参数缺失,请核实!')));

         }

}

前端在接收到支付URL后执行即可唤醒微信支付。

附一:获取用户终端设备ip方法

function getIP(){           

        if (getenv("HTTP_CLIENT_IP"))

             $ip = getenv("HTTP_CLIENT_IP");

        else if(getenv("HTTP_X_FORWARDED_FOR"))

                $ip = getenv("HTTP_X_FORWARDED_FOR");

        else if(getenv("REMOTE_ADDR"))

             $ip = getenv("REMOTE_ADDR");

        else $ip = "Unknow";

        return $ip;

}

附二:CURL请求方法

/**

     * CURL请求

     * @param $url 请求url地址

     * @param $method 请求方法 get post

     * @param null $postfields post数据数组

     * @param array $headers 请求header信息

     * @param bool|false $debug  调试开启 默认false

     * @return mixed

     */

    function httpRequest($url, $method, $postfields = null, $headers = array(), $debug = false) {

        $method = strtoupper($method);

        $ci = curl_init();

        /* Curl settings */

        curl_setopt($ci, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);

        curl_setopt($ci, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0");

        curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 60); /* 在发起连接前等待的时间,如果设置为0,则无限等待 */

        curl_setopt($ci, CURLOPT_TIMEOUT, 7); /* 设置cURL允许执行的最长秒数 */

        curl_setopt($ci, CURLOPT_RETURNTRANSFER, true);

        switch ($method) {

            case "POST":

                curl_setopt($ci, CURLOPT_POST, true);

                if (!empty($postfields)) {

                    $tmpdatastr = is_array($postfields) ? http_build_query($postfields) : $postfields;

                    curl_setopt($ci, CURLOPT_POSTFIELDS, $tmpdatastr);

                }

                break;

            default:

                curl_setopt($ci, CURLOPT_CUSTOMREQUEST, $method); /* //设置请求方式 */

                break;

        }

        $ssl = preg_match('/^https:///i',$url) ? TRUE : FALSE;

        curl_setopt($ci, CURLOPT_URL, $url);

        if($ssl){

            curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, FALSE); // https请求 不验证证书和hosts

            curl_setopt($ci, CURLOPT_SSL_VERIFYHOST, FALSE); // 不从证书中检查SSL加密算法是否存在

        }

        curl_setopt($ci, CURLOPT_FOLLOWLOCATION, 1);

        curl_setopt($ci, CURLOPT_MAXREDIRS, 2);/*指定最多的HTTP重定向的数量,这个选项是和CURLOPT_FOLLOWLOCATION一起使用的*/

        curl_setopt($ci, CURLOPT_HTTPHEADER, $headers);

        curl_setopt($ci, CURLINFO_HEADER_OUT, true);

        $response = curl_exec($ci);

        $requestinfo = curl_getinfo($ci);

        if ($debug) {

            echo "=====post data======rn";

            var_dump($postfields);

            echo "=====info===== rn";

            print_r($requestinfo);

            echo "=====response=====rn";

            print_r($response);

        }

        curl_close($ci);

        return $response;

好了,一点点菜鸟心得,有不当之处欢迎留言指证交流,一起成长,喵,就是这样!

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