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微信公众号开发(微信支付部分)

PHP zhanghui 721℃

前面写了【微信的授权登录】,接下来记录的是如何实现微信支付的功能,这里我真是服了马化腾只顾着自己复制别人的东西,却不做好自家产品的生态链,你看这微信公众号的官方DEMO写得BUG一大堆。

好了回归正题吧,在做微信支付的过程中,我也是用了民间的方法来解决。

下面是微信支付的核心类

class WxpayService
{
    protected $mchid;
    protected $appid;
    protected $key;
    public function __construct($mchid, $appid, $key)
    {
        $this->mchid = $mchid; // 微信支付商户号 PartnerID 通过微信支付商户资料审核后邮件发送
        $this->appid = $appid; //公众号APPID 通过微信支付商户资料审核后邮件发送
        $this->key = $key;   //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥
    }
    /**
     * @param string $openid 调用【网页授权获取用户信息】接口获取到用户在该公众号下的Openid
     * @param float $totalFee 收款总费用 单位元
     * @param string $outTradeNo 唯一的订单号
     * @param string $orderName 订单名称
     * @param string $notifyUrl 支付结果通知url 不要有问号
     *   https://mp.weixin.qq.com/ 微信支付-开发配置-测试目录
     *   测试目录 http://mp.izhanlue.com/paytest/  最后需要斜线,(需要精确到二级或三级目录)
     * @return string
     */
    public function createJsBizPackage($openid, $totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp)
    {
        $config = array(
            'mch_id' => $this->mchid,
            'appid' => $this->appid,
            'key' => $this->key,
        );
        $unified = array(
            'appid' => $config['appid'],
            'attach' => '支付',             //商家数据包,原样返回
            'body' => $orderName,
            'mch_id' => $config['mch_id'],
            'nonce_str' => self::createNonceStr(),
            'notify_url' => $notifyUrl,
            'openid' => $openid,            //rade_type=JSAPI,此参数必传
            'out_trade_no' => $outTradeNo,
            'spbill_create_ip' => '127.0.0.1',
            'total_fee' => intval($totalFee * 100),       //单位 转为分
            'trade_type' => 'JSAPI',
        );
        $unified['sign'] = self::getSign($unified, $config['key']);
        $responseXml = self::curlPost('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arrayToXml($unified));
        /*
        <xml>
        <return_code><![CDATA[SUCCESS]]></return_code>
        <return_msg><![CDATA[OK]]></return_msg>
        <appid><![CDATA[wx00e5904efec77699]]></appid>
        <mch_id><![CDATA[1220647301]]></mch_id>
        <nonce_str><![CDATA[1LHBROsdmqfXoWQR]]></nonce_str>
        <sign><![CDATA[ACA7BC8A9164D1FBED06C7DFC13EC839]]></sign>
        <result_code><![CDATA[SUCCESS]]></result_code>
        <prepay_id><![CDATA[wx2015032016590503f1bcd9c30421762652]]></prepay_id>
        <trade_type><![CDATA[JSAPI]]></trade_type>
        </xml>
        */
        $unifiedOrder = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);
        if ($unifiedOrder === false) {
            die('parse xml error');
        }
        if ($unifiedOrder->return_code != 'SUCCESS') {
            die($unifiedOrder->return_msg);
        }
        if ($unifiedOrder->result_code != 'SUCCESS') {
            die($unifiedOrder->err_code);
            /*
            NOAUTH 商户无此接口权限
            NOTENOUGH 余额不足
            ORDERPAID 商户订单已支付
            ORDERCLOSED 订单已关闭
            SYSTEMERROR 系统错误
            APPID_NOT_EXIST   APPID不存在
            MCHID_NOT_EXIST MCHID不存在
            APPID_MCHID_NOT_MATCH appid和mch_id不匹配
            LACK_PARAMS 缺少参数
            OUT_TRADE_NO_USED 商户订单号重复
            SIGNERROR 签名错误
            XML_FORMAT_ERROR XML格式错误
            REQUIRE_POST_METHOD 请使用post方法
            POST_DATA_EMPTY post数据为空
            NOT_UTF8 编码格式错误
            */
        }
        //$unifiedOrder->trade_type 交易类型 调用接口提交的交易类型,取值如下:JSAPI,NATIVE,APP
        //$unifiedOrder->prepay_id 预支付交易会话标识 微信生成的预支付回话标识,用于后续接口调用中使用,该值有效期为2小时
        //$unifiedOrder->code_url 二维码链接 trade_type为NATIVE是有返回,可将该参数值生成二维码展示出来进行扫码支付
        $arr = array(
            "appId" => $config['appid'],
            "timeStamp" => $timestamp,
            "nonceStr" => self::createNonceStr(),
            "package" => "prepay_id=" . $unifiedOrder->prepay_id,
            "signType" => 'MD5',
        );
        $arr['paySign'] = self::getSign($arr, $config['key']);
        return $arr;
    }
    public function notify()
    {
        $config = array(
            'mch_id' => $this->mchid,
            'appid' => $this->appid,
            'key' => $this->key,
        );
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
        //error_log($postStr, 3, './str.txt');
        /*
        $postStr = '<xml>
        <appid><![CDATA[wx00e5904efec77699]]></appid>
        <attach><![CDATA[支付测试]]></attach>
        <bank_type><![CDATA[CMB_CREDIT]]></bank_type>
        <cash_fee><![CDATA[1]]></cash_fee>
        <fee_type><![CDATA[CNY]]></fee_type>
        <is_subscribe><![CDATA[Y]]></is_subscribe>
        <mch_id><![CDATA[1220647301]]></mch_id>
        <nonce_str><![CDATA[a0tZ41phiHm8zfmO]]></nonce_str>
        <openid><![CDATA[oU3OCt5O46PumN7IE87WcoYZY9r0]]></openid>
        <out_trade_no><![CDATA[550bf2990c51f]]></out_trade_no>
        <result_code><![CDATA[SUCCESS]]></result_code>
        <return_code><![CDATA[SUCCESS]]></return_code>
        <sign><![CDATA[F6F519B4DD8DB978040F8C866C1E6250]]></sign>
        <time_end><![CDATA[20150320181606]]></time_end>
        <total_fee>1</total_fee>
        <trade_type><![CDATA[JSAPI]]></trade_type>
        <transaction_id><![CDATA[1008840847201503200034663980]]></transaction_id>
        </xml>';
        */
        $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
        if ($postObj === false) {
            die('parse xml error');
        }
        if ($postObj->return_code != 'SUCCESS') {
            die($postObj->return_msg);
        }
        if ($postObj->result_code != 'SUCCESS') {
            die($postObj->err_code);
        }
        $arr = (array)$postObj;
        unset($arr['sign']);
        if (self::getSign($arr, $config['key']) == $postObj->sign) {
            // $mch_id = $postObj->mch_id; //微信支付分配的商户号
            // $appid = $postObj->appid; //微信分配的公众账号ID
            // $openid = $postObj->openid; //用户在商户appid下的唯一标识
            // $transaction_id = $postObj->transaction_id;//微信支付订单号
            // $out_trade_no = $postObj->out_trade_no;//商户订单号
            // $total_fee = $postObj->total_fee; //订单总金额,单位为分
            // $is_subscribe = $postObj->is_subscribe; //用户是否关注公众账号,Y-关注,N-未关注,仅在公众账号类型支付有效
            // $attach = $postObj->attach;//商家数据包,原样返回
            // $time_end = $postObj->time_end;//支付完成时间
            echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';
            return $postObj;
        }
    }
    /**
     * curl get
     *
     * @param string $url
     * @param array $options
     * @return mixed
     */
    public static function curlGet($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 $data;
    }
    public static function curlPost($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 $data;
    }
    public static function createNonceStr($length = 16)
    {
        $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
        $str = '';
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }
    public static function arrayToXml($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 $xml;
    }
    /**
     * 例如:
     * appid:  wxd930ea5d5a258f4f
     * mch_id:  10000100
     * device_info: 1000
     * Body:  test
     * nonce_str: ibuaiVcKdpRxkhJA
     * 第一步:对参数按照 key=value 的格式,并按照参数名 ASCII 字典序排序如下:
     * stringA="appid=wxd930ea5d5a258f4f&body=test&device_info=1000&mch_i
     * d=10000100&nonce_str=ibuaiVcKdpRxkhJA";
     * 第二步:拼接支付密钥:
     * stringSignTemp="stringA&key=192006250b4c09247ec02edce69f6a2d"
     * sign=MD5(stringSignTemp).toUpperCase()="9A0A8659F005D6984697E2CA0A9CF3B7"
     */
    public static function getSign($params, $key)
    {
        ksort($params, SORT_STRING);
        $unSignParaString = self::formatQueryParaMap($params, false);
        $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));
        return $signStr;
    }
    protected static function formatQueryParaMap($paraMap, $urlEncode = false)
    {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v) {
            if (null != $v && "null" != $v) {
                if ($urlEncode) {
                    $v = urlencode($v);
                }
                $buff .= $k . "=" . $v . "&";
            }
        }
        $reqPar = '';
        if (strlen($buff) > 0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;
    }
}

上面这个核心类怎么使用有经验的你看完便知如何使用了,所以我就不用写了,通过上面的类我们产生 JSPAY 所需的请求参数,然后通过以下的脚本就可以实现了

<script type="text/javascript">
    function onBridgeReady(){
        WeixinJSBridge.invoke(
            'getBrandWCPayRequest', {
                "appId":"<?php echo $api['appId'] ?>",     //公众号名称,由商户传入
                "timeStamp":"<?php echo $api['timeStamp'] ?>",         //时间戳,自1970年以来的秒数
                "nonceStr":"<?php echo $api['nonceStr'] ?>", //随机串
                "package":"<?php echo $api['package'] ?>",
                "signType":"<?php echo $api['signType'] ?>",         //微信签名方式:
                "paySign":"<?php echo $api['paySign'] ?>" //微信签名
            },
            function(res){
                if(res.err_msg == "get_brand_wcpay_request:ok" ) {alert('支付成功');}
                if(res.err_msg == "get_brand_wcpay_request:cancel" ) {alert('支付过程中用户取消');}
                if(res.err_msg == "get_brand_wcpay_request:fail" ) {alert('支付失败');}
     // 使用以上方式判断前端返回,微信团队郑重提示:res.err_msg将在用户支付成功后返回    ok,但并不保证它绝对可靠。
            }
        );
    }
    if (typeof WeixinJSBridge == "undefined"){
        if( document.addEventListener ){
            document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
        }else if (document.attachEvent){
            document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
            document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
        }
    }else{
        onBridgeReady();
    }
</script>

看吧比比官方 DEMO,代码量就少很多,还需要什么功能可以继续往下走。

转载请注明:隨習筆記 » 微信公众号开发(微信支付部分)