微信之微信支付(封装)--jsapi

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 admin  2020-12-06 21:26:43 

<?php

header('Content-type:text/html; Charset=utf-8');

$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

$appid = '';  //微信支付申请对应的公众号的APPID

$appKey = '';   //微信支付申请对应的公众号的APP Key

$apiKey = '';   //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥

//①、获取用户openid

$wxPay = new WxpayService($mchid,$appid,$appKey,$apiKey);

$openId = $wxPay->GetOpenid();      //获取openid

if(!$openId) exit('获取openid失败');

//②、统一下单

$outTradeNo = uniqid();     //你自己的商品订单号

$payAmount = 0.01;          //付款金额，单位:元

$orderName = '支付测试';    //订单标题

$notifyUrl = 'https://www.xxx.com/wx/notify.php';     //付款成功后的回调地址(不要有问号)

$payTime = time();      //付款时间

$jsApiParameters = $wxPay->createJsBizPackage($openId,$payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);

$jsApiParameters = json_encode($jsApiParameters);

?>

    <html>

    <head>

        <meta charset="utf-8" />

        <meta name="viewport" content="width=device-width, initial-scale=1"/>

        <title>微信支付样例-支付</title>

        <script type="text/javascript">

            //调用微信JS api 支付

            function jsApiCall()

            {

                WeixinJSBridge.invoke(

                    'getBrandWCPayRequest',

                    <?php echo $jsApiParameters; ?>,

                    function(res){

                        WeixinJSBridge.log(res.err_msg);

                        if(res.err_msg=='get_brand_wcpay_request:ok'){

                            alert('支付成功！');

                        }else{

                            alert('支付失败：'+res.err_code+res.err_desc+res.err_msg);

                        }

                    }

                );

            }

            function callpay()

            {

                if (typeof WeixinJSBridge == "undefined"){

                    if( document.addEventListener ){

                        document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);

                    }else if (document.attachEvent){

                        document.attachEvent('WeixinJSBridgeReady', jsApiCall);

                        document.attachEvent('onWeixinJSBridgeReady', jsApiCall);

                    }

                }else{

                    jsApiCall();

                }

            }

        </script>

    </head>

    <body>

    <h1>微信支付</h1>

    <br/>

    <font color="#9ACD32"><b>该笔订单支付金额为<span style="color:#f00;font-size:50px"><?php echo $payAmount?>元</span>钱</b></font><br/><br/>

    <div align="center">

        <button style="width:210px; height:50px; border-radius: 15px;background-color:#FE6714; border:0px #FE6714 solid; cursor: pointer;  color:white;  font-size:16px;" type="button" onclick="callpay()" >立即支付</button>

    </div>

    </body>

    </html>

<?php

class WxpayService

{

    protected $mchid;

    protected $appid;

    protected $appKey;

    protected $apiKey;

    public $data = null;

    public function __construct($mchid, $appid, $appKey,$key)

    {

        $this->mchid = $mchid; //https://pay.weixin.qq.com 产品中心-开发配置-商户号

        $this->appid = $appid; //微信支付申请对应的公众号的APPID

        $this->appKey = $appKey; //微信支付申请对应的公众号的APP Key

        $this->apiKey = $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

    }

    /**

     * 通过跳转获取用户的openid，跳转流程如下：

     * 1、设置自己需要调回的url及其其他参数，跳转到微信服务器https://open.weixin.qq.com/connect/oauth2/authorize

     * 2、微信服务处理完成之后会跳转回用户redirect_uri地址，此时会带上一些参数，如：code

     * @return 用户的openid

     */

    public function GetOpenid()

    {

        //通过code获得openid

        if (!isset($_GET['code'])){

            //触发微信返回code码

            $scheme = $_SERVER['HTTPS']=='on' ? 'https://' : 'http://';

            $uri = $_SERVER['PHP_SELF'].$_SERVER['QUERY_STRING'];

            if($_SERVER['REQUEST_URI']) $uri = $_SERVER['REQUEST_URI'];

            $baseUrl = urlencode($scheme.$_SERVER['HTTP_HOST'].$uri);

            $url = $this->__CreateOauthUrlForCode($baseUrl);

            Header("Location: $url");

            exit();

        } else {

            //获取code码，以获取openid

            $code = $_GET['code'];

            $openid = $this->getOpenidFromMp($code);

            return $openid;

        }

    }

    /**

     * 通过code从工作平台获取openid机器access_token

     * @param string $code 微信跳转回来带上的code

     * @return openid

     */

    public function GetOpenidFromMp($code)

    {

        $url = $this->__CreateOauthUrlForOpenid($code);

        $res = self::curlGet($url);

        //取出openid

        $data = json_decode($res,true);

        $this->data = $data;

        $openid = $data['openid'];

        return $openid;

    }

    /**

     * 构造获取open和access_toke的url地址

     * @param string $code，微信跳转带回的code

     * @return 请求的url

     */

    private function __CreateOauthUrlForOpenid($code)

    {

        $urlObj["appid"] = $this->appid;

        $urlObj["secret"] = $this->appKey;

        $urlObj["code"] = $code;

        $urlObj["grant_type"] = "authorization_code";

        $bizString = $this->ToUrlParams($urlObj);

        return "https://api.weixin.qq.com/sns/oauth2/access_token?".$bizString;

    }

    /**

     * 构造获取code的url连接

     * @param string $redirectUrl 微信服务器回跳的url，需要url编码

     * @return 返回构造好的url

     */

    private function __CreateOauthUrlForCode($redirectUrl)

    {

        $urlObj["appid"] = $this->appid;

        $urlObj["redirect_uri"] = "$redirectUrl";

        $urlObj["response_type"] = "code";

        $urlObj["scope"] = "snsapi_base";

        $urlObj["state"] = "STATE"."#wechat_redirect";

        $bizString = $this->ToUrlParams($urlObj);

        return "https://open.weixin.qq.com/connect/oauth2/authorize?".$bizString;

    }

    /**

     * 拼接签名字符串

     * @param array $urlObj

     * @return 返回已经拼接好的字符串

     */

    private function ToUrlParams($urlObj)

    {

        $buff = "";

        foreach ($urlObj as $k => $v)

        {

            if($k != "sign") $buff .= $k . "=" . $v . "&";

        }

        $buff = trim($buff, "&");

        return $buff;

    }

    /**

     * 统一下单

     * @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

     * @param string $timestamp 支付时间

     * @return string

     */

    public function createJsBizPackage($openid, $totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp)

    {

        $config = array(

            'mch_id' => $this->mchid,

            'appid' => $this->appid,

            'key' => $this->apiKey,

        );

        //$orderName = iconv('GBK','UTF-8',$orderName);

        $unified = array(

            'appid' => $config['appid'],

            'attach' => 'pay',             //商家数据包，原样返回，如果填写中文，请注意转换为utf-8

            '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));

        //禁止引用外部xml实体

        libxml_disable_entity_loader(true);

        $unifiedOrder = simplexml_load_string($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);

        }

        $arr = array(

            "appId" => $config['appid'],

            "timeStamp" => "$timestamp",        //这里是字符串的时间戳，不是int，所以需加引号

            "nonceStr" => self::createNonceStr(),

            "package" => "prepay_id=" . $unifiedOrder->prepay_id,

            "signType" => 'MD5',

        );

        $arr['paySign'] = self::getSign($arr, $config['key']);

        return $arr;

    }

    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;

    }

    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;

    }

}