微信小程序集中开发日志 DAY 5 【支付】

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支付呢,我是先通过微信提供的sdk把环境跑通,然后才在项目中做测试

微信提供的SDK地址

WXML

<span class="car_order_confirm" bindtap="pay">前往支付</span>

js

openid已经缓存在微信缓存里,这边就直接进行支付了

pay: function () {
    wx.request({
        url: 'http://www.--/payfee.php?openid=' +         wx.getStorageSync('openId')+'&fee='+that.data.allpri+'&oid='+that.data.oid,//改成你自己的链接
        header: {
            'Content-Type': 'application/x-www-form-urlencoded'
        },
        method: 'POST',
            success: function (res) {
                console.log('调起支付');
                wx.requestPayment({
                'timeStamp': res.data.timeStamp,
                'nonceStr': res.data.nonceStr,
                'package': res.data.package,
                'signType': 'MD5',
                'paySign': res.data.paySign,
                'success': function (res) {
                    console.log('success')
                    wx.request({
                        wx.showToast({
                            title: '支付成功',
                            icon: 'success',
                            duration: 3000
                        });
                    }); 
                },
                'fail': function (res) {
                    console.log('fail');
                },
                'complete': function (res) {
                    console.log('complete');
                }
            });
        },
        fail: function (res) {
            console.log(res.data)
        }
    })
}

payfee.php

include 'WeixinPay.php';
$appid='' //小程序appid;
$openid= $_GET['openid'] //用户ID;
$mch_id='' //商户号;
$key=''  //商户设置的key;
$out_trade_no = $_GET['oid'];
//$total_fee = $_GET['fee'];
if(empty($total_fee)) 
{
    $body = "支付金额";
    $total_fee = floatval(0.01*100);
}
else {
    $body = "支付金额";
    $total_fee = floatval($total_fee*100);
}
$weixinpay = new WeixinPay($appid,$openid,$mch_id,$key,$out_trade_no,$body,$total_fee);
$return=$weixinpay->pay();

echo json_encode($return);

weixinPay.php

<?php

/*
 * 小程序微信支付
 */


class WeixinPay {


    protected $appid;
    protected $mch_id;
    protected $key;
    protected $openid;
    protected $out_trade_no;
    protected $body;
    protected $total_fee;
    function __construct($appid, $openid, $mch_id, $key,$out_trade_no,$body,$total_fee) {
        $this->appid = $appid;
        $this->openid = $openid;
        $this->mch_id = $mch_id;
        $this->key = $key;
        $this->out_trade_no = $out_trade_no;
        $this->body = $body;
        $this->total_fee = $total_fee;
    }


    public function pay() {
        //统一下单接口
        $return = $this->weixinapp();
        return $return;
    }


    //统一下单接口
    private function unifiedorder() {
        $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
        $parameters = array(
            'appid' => $this->appid, //小程序ID
            'mch_id' => $this->mch_id, //商户号
            'nonce_str' => $this->createNoncestr(), //随机字符串
            //            'body' => 'test', //商品描述
            'body' => $this->body,
            //            'out_trade_no' => '2015450806125348', //商户订单号
            'out_trade_no'=> $this->out_trade_no,
            //            'total_fee' => floatval(0.01 * 100), //总金额 单位 分
            'total_fee' => $this->total_fee,
            //            'spbill_create_ip' => $_SERVER['REMOTE_ADDR'], //终端IP
            'spbill_create_ip' => '192.168.0.161', //终端IP
            'notify_url' => 'http://www.weixin.qq.com/wxpay/pay.php', //通知地址  确保外网能正常访问
            'openid' => $this->openid, //用户id
            'trade_type' => 'JSAPI'//交易类型
        );
        //统一下单签名
        $parameters['sign'] = $this->getSign($parameters);
        $xmlData = $this->arrayToXml($parameters);
        $return = $this->xmlToArray($this->postXmlCurl($xmlData, $url, 60));
        return $return;
    }


    private static function postXmlCurl($xml, $url, $second = 30)
    {
        $ch = curl_init();
        //设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //严格校验
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);


        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
        curl_setopt($ch, CURLOPT_TIMEOUT, 40);
        set_time_limit(0);


        //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($ch);
            throw new WxPayException("curl出错,错误码:$error");
        }
    }



    //数组转换成xml
    private function arrayToXml($arr) {
        $xml = "<root>";
        foreach ($arr as $key => $val) {
            if (is_array($val)) {
                $xml .= "<" . $key . ">" . arrayToXml($val) . "</" . $key . ">";
            } else {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
            }
        }
        $xml .= "</root>";
        return $xml;
    }


    //xml转换成数组
    private function xmlToArray($xml) {


        //禁止引用外部xml实体


        libxml_disable_entity_loader(true);


        $xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);


        $val = json_decode(json_encode($xmlstring), true);


        return $val;
    }


    //微信小程序接口
    private function weixinapp() {
        //统一下单接口
        $unifiedorder = $this->unifiedorder();
        //        print_r($unifiedorder);
        $parameters = array(
            'appId' => $this->appid, //小程序ID
            'timeStamp' => '' . time() . '', //时间戳
            'nonceStr' => $this->createNoncestr(), //随机串
            'package' => 'prepay_id=' . $unifiedorder['prepay_id'], //数据包
            'signType' => 'MD5'//签名方式
        );
        //签名
        $parameters['paySign'] = $this->getSign($parameters);
        return $parameters;
    }


    //作用:产生随机字符串,不长于32位
    private function createNoncestr($length = 32) {
        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
        $str = "";
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }


    //作用:生成签名
    private function getSign($Obj) {
        foreach ($Obj as $k => $v) {
            $Parameters[$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=" . $this->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_;
    }


    ///作用:格式化参数,签名过程需要使用
    private function formatBizQueryParaMap($paraMap, $urlencode) {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v) {
            if ($urlencode) {
                $v = urlencode($v);
            }
            $buff .= $k . "=" . $v . "&";
        }
        $reqPar;
        if (strlen($buff) > 0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;
    }


}

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转载自blog.csdn.net/qq_41654694/article/details/86656328