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導讀微信（WeChat）是騰訊公司于2011年1月21日推出的一個為智能終端提供即時通訊服務的免費應用程序，由張小龍所帶領的騰訊廣州研發中心產品團隊打造 [2] 。微信支持跨通信運營商、跨操作系統平臺...

微信（WeChat）是騰訊公司于2011年1月21日推出的一個為智能終端提供即時通訊服務的免費應用程序，由張小龍所帶領的騰訊廣州研發中心產品團隊打造 [2] 。微信支持跨通信運營商、跨操作系統平臺通過網絡快速發送免費（需消耗少量網絡流量）語音短信、視頻、圖片和文字，同時，也可以使用通過共享流媒體內容的資料和基于位置的社交插件“搖一搖”、“漂流瓶”、“朋友圈”、”公眾平臺“、”語音記事本“等服務插件。

H5支付時出現“簽名錯誤”怎么辦？注意調用微信“統一下單”接口后返回pre_pay_id后，需要用戶再次進行簽名返回給HTML； “支付目錄沒有授權”，進入微信商家管理后臺設置即可。

一、Model層，Wxpay.php

<?php
namespace app\common\model;
class Wxpay
{
    private $appid = 'wxe8*****d4';                            //微信公眾號appid
    private $secret = '37c4*******5f0';                        //微信公眾號appsecret               
    private $mchid = '13******02';                             //商家號
    private $key = '5363e******49e8';                          //支付密鑰
    private $sslcert_path = 'apiclient_cert.pem';              //證書所在絕對路徑
    private $sslkey_path = 'apiclient_key.pem';                //證書所在絕對路徑
    
    public function __construct($appid = '', $secret = '', $mchid = '', $key = '')
    {
        if(!empty($appid))     $this->appid = $appid;
        if(!empty($secret))    $this->secret = $secret;
        if(!empty($mchid))     $this->mchid  = $mchid;
        if(!empty($key))       $this->key= $key;
    }
    /*
     * 微信內H5調起支付
     * @params string $openid : 微信用戶openid
     * @params string $out_trade_no : 商家生成的訂單號（唯一性）
     * @params int $total_fee : 支付金額，單位分
     * return array $ret : 返回支付時所需要的數據
     * */
    public function payForWeixin($openid,$out_trade_no,$total_fee,$attach='微信支付',$body='微信支付')
    {
        //支付數據
        $data['openid'] = $openid;
        $data['out_trade_no'] = $out_trade_no;
        $data['total_fee'] = $total_fee*100;
        $data['spbill_create_ip'] = $_SERVER["REMOTE_ADDR"];
        $data['attach'] = $attach;
        $data['body'] = $body;
        $data['appid'] = $this->appid;
        $data['mch_id'] = $this->mchid;
        $data['nonce_str'] = random(12);
        $data['trade_type'] = "JSAPI";
        $data['notify_url'] = "http://****.com/home/wxpaynofiy/notify.html";

        $sign = $this->getParam($data);
        $dataXML = "<xml>
           <appid>".$data['appid']."</appid>
           <attach>".$data['attach']."</attach>
           <body>".$data['body']."</body>
           <mch_id>".$data['mch_id']."</mch_id>
           <nonce_str>".$data['nonce_str']."</nonce_str>
           <notify_url>".$data['notify_url']."</notify_url>
           <openid>".$data['openid']."</openid>
           <out_trade_no>".$data['out_trade_no']."</out_trade_no>
           <spbill_create_ip>".$data['spbill_create_ip']."</spbill_create_ip>
           <total_fee>".$data['total_fee']."</total_fee>
           <trade_type>".$data['trade_type']."</trade_type>
           <sign>".$sign."</sign>
        </xml>";
        $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
        $result =  $this->https_post($url,$dataXML);
        $ret = $this->xmlToArray($result);
        
        if($ret['return_code'] == 'SUCCESS' && $ret['return_msg'] == 'OK') {
            return array(
                'appId'     => $this->appid,
                'timeStamp' => time(),
                'nonceStr'  => $data['nonce_str'],
                'package'   => 'prepay_id='.$ret['prepay_id'],
                'signType'  => 'MD5',
                'paySign'   => $sign
            );
        } else {
            $this->errorLog("微信支付失敗，",$ret);
            return null;
        }
    }
     /*
     *   微信二維碼支付
     *   @params string $openid : 用戶的openid
     *   @params string $out_trade_no : 商戶訂單號
     *   @params number $total_fee : 訂單金額，單位分
     *   return string $code_url : 二維碼URL鏈接
     */
    public function payForQrcode($out_trade_no,$total_fee,$body="魔盒CMS",$attach="微信支付")
    {
        //支付數據
        $data['out_trade_no'] = $out_trade_no;
        $data['total_fee'] = $total_fee*100;
        $data['spbill_create_ip'] = $_SERVER["REMOTE_ADDR"];
        $data['attach'] = $attach;
        $data['body'] = $body;
        $data['appid'] = $this->appid;
        $data['mch_id'] = $this->mchid;
        $data['nonce_str'] = random(12);
        $data['trade_type'] = "NATIVE";
        $data['notify_url'] = "http://****.com/home/wxpaynofiy/notify.html";

        $sign = $this->getParam($data);
        $dataXML = "<xml>
           <appid>".$data['appid']."</appid>
           <attach>".$data['attach']."</attach>
           <body>".$data['body']."</body>
           <mch_id>".$data['mch_id']."</mch_id>
           <nonce_str>".$data['nonce_str']."</nonce_str>
           <notify_url>".$data['notify_url']."</notify_url>
           <out_trade_no>".$data['out_trade_no']."</out_trade_no>
           <spbill_create_ip>".$data['spbill_create_ip']."</spbill_create_ip>
           <total_fee>".$data['total_fee']."</total_fee>
           <trade_type>".$data['trade_type']."</trade_type>
           <sign>".$sign."</sign>
        </xml>";
        $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
        $result =  $this->https_post($url,$dataXML);
        $ret = $this->xmlToArray($result);
        if($ret['return_code'] == 'SUCCESS' && $ret['return_msg'] == 'OK') {
            return $ret['code_url'];
        } else {
            $this->errorLog("獲取微信支付二維碼失敗，",$ret);
            return null;
        }
    }

    /*
     * 訂單查詢
     * @params string $transaction_id : 微信訂單號
     * @params string $out_trade_no : 商家訂單號（與微信訂單號二選一）
     * */
    public function findOrder($out_trade_no)
    {
        $data['appid'] = $this->appid;
        $data['mch_id'] = $this->mchid;
        $data['nonce_str'] = random(12);
        $data['out_trade_no'] = $out_trade_no;
        $sign = $this->getParam($data);
        $dataXML = "<xml>
            <appid>".$data['appid']."</appid>
            <mch_id>".$data['mch_id']."</mch_id>
            <nonce_str>".$data['nonce_str']."</nonce_str>
            <out_trade_no>".$data['out_trade_no']."</out_trade_no>
            <sign>".$sign."</sign>
         </xml>";
        $url = 'https://api.mch.weixin.qq.com/pay/orderquery';
        $result =  $this->https_post($url,$dataXML);
        $ret = $this->xmlToArray($result);
        if($ret['return_code'] == 'SUCCESS' && $ret['return_msg'] == 'OK') {
            return $ret;
        } else {
            $this->errorLog("查詢微信支付訂單失敗，",$ret);
            return null;
        }
    }
    /*
    * 退款訂單查詢
    * @params string $transaction_id : 微信訂單號
    * @params string $out_trade_no : 商家訂單號（與微信訂單號二選一）
    * */
    public function findRefundOrder($out_trade_no)
    {
        $data['appid'] = $this->appid;
        $data['mch_id'] = $this->mchid;
        $data['nonce_str'] = random(12);
        $data['out_trade_no'] = $out_trade_no;
        $sign = $this->getParam($data);
        $dataXML = "<xml>
            <appid>".$data['appid']."</appid>
            <mch_id>".$data['mch_id']."</mch_id>
            <nonce_str>".$data['nonce_str']."</nonce_str>
            <out_trade_no>".$data['out_trade_no']."</out_trade_no>
            <sign>".$sign."</sign>
         </xml>";
        $url = 'https://api.mch.weixin.qq.com/pay/refundquery';
        $result =  $this->https_post($url,$dataXML);
        $ret = $this->xmlToArray($result);
        if($ret['return_code'] == 'SUCCESS' && $ret['return_msg'] == 'OK') {
            return $ret;
        } else {
            $this->errorLog("查詢微信支付退款訂單失敗，",$ret);
            return $ret['err_code_des'];
        }
    }
    /*
     * 申請退款
     * @params string $out_trade_no : 商戶訂單號
     * @params string $out_refund_no : 商戶退款單號
     * @params int $total_fee : 訂單金額
     * @params int $refund_fee : 退款金額
     * @params string $refund_desc : 退款原因
     * */
    public function refund($out_trade_no,$out_refund_no,$total_fee,$refund_fee,$refund_desc='退款')
    {
        $data['appid']  = $this->appid;
        $data['mch_id'] = $this->mchid;
        $data['nonce_str'] = random(12);
        $data['out_trade_no'] = $out_trade_no;
        $data['out_refund_no'] = $out_refund_no;
        $data['total_fee'] = $total_fee*100;
        $data['refund_fee'] = $refund_fee*100;
        $data['refund_desc'] = $refund_desc;
        $data['notify_url'] = "http://*****.com/home/wxpaynofiy/refund.html";
        $sign = $this->getParam($data);
        $dataXML = "<xml>
           <appid>".$data['appid']."</appid>
           <mch_id>".$data['mch_id']."</mch_id>
           <nonce_str>".$data['nonce_str']."</nonce_str>
           <out_trade_no>".$data['out_trade_no']."</out_trade_no>
           <out_refund_no>".$data['out_refund_no']."</out_refund_no>
           <total_fee>".$data['total_fee']."</total_fee>
           <refund_fee>".$data['refund_fee']."</refund_fee>
           <refund_desc>".$data['refund_desc']."</refund_desc>
           <notify_url>".$data['notify_url']."</notify_url>
           <sign>".$sign."</sign>
        </xml>";
        $url = 'https://api.mch.weixin.qq.com/secapi/pay/refund';
        $result =  $this->https_post($url,$dataXML,true);
        $ret = $this->xmlToArray($result);
        if($ret['return_code'] == 'SUCCESS' && $ret['return_msg'] == 'OK') {
            return $ret;
        } else {
            $this->errorLog("微信退款失敗，",$ret);
            return null;
        }
    }
    /*
     * 企業付款至用戶零錢
     * @params string $openid : 用戶openid
     * @params int $total_fee : 付款金額，單位分
     * @params string $out_trade_no : 商家訂單號
     * @params string $username : 微信用戶名稱（注意微信昵稱若為空時支付會出錯）
     * @params string $desc : 付款描述
     * @params string $check_name : 是否檢測用戶名
     * */
    public function payForUser($openid,$total_fee,$out_trade_no,$username='魔盒CMS',$desc='魔盒CMS付款給用戶',$check_name='NO_CHECK')
    {
        $data['amount'] = $total_fee*100;
        $data['check_name'] = $check_name;
        $data['desc'] = $desc;
        $data['mch_appid'] = $this->appid;
        $data['mchid'] = $this->mchid;
        $data['nonce_str'] = random(12);
        $data['openid'] = $openid;
        $data['partner_trade_no'] = $out_trade_no;
        $data['re_user_name'] = $username;
        $data['spbill_create_ip'] = $_SERVER["REMOTE_ADDR"];
        $sign = $this->getParam($data);

        $dataXML="<xml>
        <mch_appid>".$data['mch_appid']."</mch_appid>
        <mchid>".$data['mchid']."</mchid>
        <nonce_str>".$data['nonce_str']."</nonce_str>
        <partner_trade_no>".$data['partner_trade_no']."</partner_trade_no>
        <openid>".$data['openid']."</openid>
        <check_name>".$data['check_name']."</check_name>
        <re_user_name>".$data['re_user_name']."</re_user_name>
        <amount>".$data['amount']."</amount>
        <desc>".$data['desc']."</desc>
        <spbill_create_ip>".$data['spbill_create_ip']."</spbill_create_ip>
        <sign>".$sign."</sign>
        </xml>";

        $url = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers';
        $result =  $this->https_post($url,$dataXML,true);
        $ret = $this->xmlToArray($result);
        if($ret['return_code']=='SUCCESS' && $ret['result_code'] == 'SUCCESS')
        {
            //支付成功返回商戶訂單號、微信訂單號、微信支付成功時間
            $result['partner_trade_no'] = $ret['partner_trade_no'];
            $result['payment_no'] = $ret['payment_no'];
            $result['payment_time'] = $ret['payment_time'];
            return $ret;
        } else {
           $this->errorLog('付款給用戶失敗',$ret);
           return null;
        }
    }
     /*
     * 普通紅包
     * @params string $out_trade_no : 商家訂單號
     * @params string $openid : 接收紅包用戶的openid
     * @params int $total_fee : 紅包金額，單位分
     * @params int $total_num : 紅包發放總人數
     * @params string $wishing : 紅包祝福語
     * @params string $act_name : 活動名稱
     * @params string $remark : 備注
     * @params string $scene_id ：場景值ID。發放紅包使用場景，紅包金額大于200或者小于1元時必傳。PRODUCT_1:商品促銷、PRODUCT_2:抽獎、PRODUCT_3:虛擬物品兌獎 、PRODUCT_4:企業內部福利、PRODUCT_5:渠道分潤、PRODUCT_6:保險回饋、PRODUCT_7:彩票派獎、PRODUCT_8:稅務刮獎
     * */
    public function redPack($openid,$total_fee,$out_trade_no,$total_num = 1,$wishing = '感謝您光臨***平臺進行購物',$act_name='***購物發紅包',$remark = '購物領紅包')
    {
        $data['mch_billno']     = $out_trade_no;
        $data['mch_id']         = $this->mchid;
        $data['wxappid']        = $this->appid;
        $data['send_name']      = '發送紅包者的名稱';
        $data['re_openid']      = $openid;
        $data['total_amount']   = $total_fee;
        $data['total_num']      = $total_num;
        $data['wishing']        = $wishing;
        $data['client_ip']      = $_SERVER["REMOTE_ADDR"];
        $data['act_name']       = $act_name;
        $data['remark']         = $remark;
        $data['nonce_str']      = random(12);
        $sign = $this->getParam($data);

        $dataXML="<xml>
        <sign>".$sign."</sign>
        <mch_billno>".$data['mch_billno']."</mch_billno>
        <mch_id>".$data['mch_id']."</mch_id>
        <wxappid>".$data['wxappid']."</wxappid>
        <send_name>".$data['send_name']."</send_name>
        <re_openid>".$data['re_openid']."</re_openid>
        <total_amount>".$data['total_amount']."</total_amount>
        <total_num>".$data['total_num']."</total_num>
        <wishing>".$data['wishing']."</wishing>
        <client_ip>".$data['client_ip']."</client_ip>
        <act_name>".$data['act_name']."</act_name>
        <remark>".$data['remark']."</remark>
        <nonce_str>".$data['nonce_str']."</nonce_str>
        </xml>";

        $url = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/sendredpack';
        $result =  $this->https_post($url,$dataXML,true);
        $ret = $this->xmlToArray($result);
        if($ret['return_code']=='SUCCESS' && $ret['result_code'] == 'SUCCESS')
        {
            return $ret;
        } else {
            $this->errorLog('發放普通紅包失敗',$ret);
            return $ret['err_code_des'];
        }

    }

    /*
    * 裂變紅包：一次可以發放一組紅包。首先領取的用戶為種子用戶，種子用戶領取一組紅包當中的一個，并可以通過社交分享將剩下的紅包給其他用戶。
     * 裂變紅包充分利用了人際傳播的優勢。
    * @params string $out_trade_no : 商家訂單號
    * @params string $openid : 接收紅包用戶的openid
    * @params int $total_fee : 紅包金額，單位分
    * @params int $total_num : 紅包發放總人數
    * @params string $wishing : 紅包祝福語
    * @params string $act_name : 活動名稱
    * @params string $remark : 備注
    * @params string $scene_id ：場景值ID。發放紅包使用場景，紅包金額大于200或者小于1元時必傳。PRODUCT_1:商品促銷、PRODUCT_2:抽獎、PRODUCT_3:虛擬物品兌獎 、PRODUCT_4:企業內部福利、PRODUCT_5:渠道分潤、PRODUCT_6:保險回饋、PRODUCT_7:彩票派獎、PRODUCT_8:稅務刮獎
    * */
    public function redPackGroup($openid,$total_fee,$out_trade_no,$total_num,$wishing = '感謝您光臨***進行購物',$act_name='**購物發紅包',$remark = '購物領紅包')
    {
        $data['mch_billno']     = $out_trade_no;
        $data['mch_id']         = $this->mchid;
        $data['wxappid']        = $this->appid;
        $data['send_name']      = '發送紅包者的名稱';
        $data['re_openid']      = $openid;
        $data['total_amount']   = $total_fee;
        $data['amt_type']       = 'ALL_RAND';   //ALL_RAND—全部隨機,商戶指定總金額和紅包發放總人數，由微信支付隨機計算出各紅包金額
        $data['total_num']      = $total_num;
        $data['wishing']        = $wishing;
        $data['client_ip']      = $_SERVER["REMOTE_ADDR"];
        $data['act_name']       = $act_name;
        $data['remark']         = $remark;
        $data['nonce_str']      = random(12);
        $sign = $this->getParam($data);

        $dataXML="<xml>
        <sign>".$sign."</sign>
        <mch_billno>".$data['mch_billno']."</mch_billno>
        <mch_id>".$data['mch_id']."</mch_id>
        <wxappid>".$data['wxappid']."</wxappid>
        <send_name>".$data['send_name']."</send_name>
        <re_openid>".$data['re_openid']."</re_openid>
        <total_amount>".$data['total_amount']."</total_amount>
        <amt_type>".$data['amt_type']."</amt_type> 
        <total_num>".$data['total_num']."</total_num>
        <wishing>".$data['wishing']."</wishing>
        <client_ip>".$data['client_ip']."</client_ip>
        <act_name>".$data['act_name']."</act_name>
        <remark>".$data['remark']."</remark>
        <nonce_str>".$data['nonce_str']."</nonce_str>
        </xml>";

        $url = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/sendgroupredpack';
        $result =  $this->https_post($url,$dataXML,true);
        $ret = $this->xmlToArray($result);
        if($ret['return_code']=='SUCCESS' && $ret['result_code'] == 'SUCCESS')
        {
            return $ret;
        } else {
            $this->errorLog('發放裂變紅包失敗',$ret);
            return $ret['err_code_des'];
        }

    }
    /*
     * 查詢紅包記錄
     * @params string $out_trade_no : 商家訂單號
     * */
    public function findRedPack($out_trade_no)
    {
        $data['mch_billno']     = $out_trade_no;
        $data['mch_id']         = $this->mchid;
        $data['appid']          = $this->appid;
        $data['bill_type']      = 'MCHT';           //MCHT:通過商戶訂單號獲取紅包信息。
        $data['nonce_str']      = random(12);
        $sign = $this->getParam($data);

        $dataXML="<xml>
        <sign>".$sign."</sign>
        <mch_billno>".$data['mch_billno']."</mch_billno>
        <mch_id>".$data['mch_id']."</mch_id>
        <appid>".$data['appid']."</appid>
        <bill_type>".$data['bill_type']."</bill_type> 
        <nonce_str>".$data['nonce_str']."</nonce_str>
        </xml>";

        $url = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/gethbinfo';
        $result =  $this->https_post($url,$dataXML,true);
        $ret = $this->xmlToArray($result);
        if($ret['return_code']=='SUCCESS' && $ret['result_code'] == 'SUCCESS')
        {
            return $ret;
        } else {
            $this->errorLog('查詢紅包記錄失敗',$ret);
            return $ret['err_code_des'];
        }
    }
    /*
     * 獲取用戶微信的OPENID
     * */
    public function openid($c=false)
    {
        if($_GET['state']!="zgm"){
            $t = $c ? "snsapi_userinfo" : "snsapi_base";
            $url=urlencode(get_url());
            $url="https://open.weixin.qq.com/connect/oauth2/authorize?appid=".$this->appid."&redirect_uri=".$url."&response_type=code&scope=".$t."&state=zgm#wechat_redirect";
            echo "<html><script>window.location.href='$url';</script></html>";
            exit;
        }
        if($_GET['code']){
            $url="https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$this->appid."&secret=".$this->secret."&code=".$_GET['code']."&grant_type=authorization_code";
            $wx_db=json_decode($this->https_get($url));
            if($c){
                $url_2="https://api.weixin.qq.com/sns/userinfo?access_token=".$wx_db->access_token."&openid=".$wx_db->openid."&lang=zh_CN";
                $db=json_decode($this->https_get($url_2));
                return $db;
            }else{
                return $wx_db->openid;
            }
        }
    }
    /*
    * 發起網絡GET請求
    * @params string $url : URL鏈接
    */
    private function https_get($url)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE); 
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE); 
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE); 
        curl_setopt($curl, CURLOPT_HEADER, FALSE) ; 
        curl_setopt($curl, CURLOPT_TIMEOUT,60);   
        if (curl_errno($curl)) {
            return 'Errno'.curl_error($curl);
        }
        else{$result=curl_exec($curl);}
        curl_close($curl);
        return $result;
    }
    //對參數排序，生成MD5加密簽名
    private function getParam($paramArray, $isencode=false)
    {
        $paramStr = '';
        ksort($paramArray);
        $i = 0;
        foreach ($paramArray as $key => $value)
        {
            if ($key == 'Signature'){
                continue;
            }
            if ($i == 0){
                $paramStr .= '';
            }else{
                $paramStr .= '&';
            }
            $paramStr .= $key . '=' . ($isencode?urlencode($value):$value);
            ++$i;
        }
        $stringSignTemp=$paramStr."&key=".$this->key;
        $sign=strtoupper(md5($stringSignTemp));
        return $sign;
    }
    //POST提交數據
    private function https_post($url,$data,$ssl = false)
    {
        $ch = curl_init ();
        curl_setopt ( $ch, CURLOPT_URL, $url );
        curl_setopt ( $ch, CURLOPT_CUSTOMREQUEST, "POST" );
        curl_setopt ( $ch, CURLOPT_SSL_VERIFYPEER, FALSE );
        curl_setopt ( $ch, CURLOPT_SSL_VERIFYHOST, FALSE );
        if($ssl) {
            curl_setopt ( $ch,CURLOPT_SSLCERT,$this->sslcert_path);
            curl_setopt ( $ch,CURLOPT_SSLKEY,$this->sslkey_path);
        }
        curl_setopt ( $ch, CURLOPT_FOLLOWLOCATION, 1 );
        curl_setopt ( $ch, CURLOPT_AUTOREFERER, 1 );
        curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data );
        curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, true );
        $result = curl_exec($ch);
        if (curl_errno($ch)) {
            return 'Errno: '.curl_error($ch);
        }
        curl_close($ch);
        return $result;
    }
    /*
    * XML轉array
    * @params xml $xml : xml 數據
    * return array $data : 轉義后的array數組
    */
    private function xmlToArray($xml)
    {
        libxml_disable_entity_loader(true);
        $xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);
        $val = json_decode(json_encode($xmlstring),true);
        return $val;
    }
    /*
    * 記錄日志
    * @params string $msg : 提示語句
    * @params array $ret : 錯誤結果
    */
    private function errorLog($msg,$ret)
    {
        file_put_contents(ROOT_PATH . 'runtime/error/wxpay.log', "[" . date('Y-m-d H:i:s') . "] ".$msg."," .json_encode($ret).PHP_EOL, FILE_APPEND);
    }
}

二、Controller層，Test.php

<?php
namespace app\goods\controller;
use app\common\model\Wxpay;
class Test
{
    /*
    * 調用微信支付
    * 一、獲取微信用戶的openid; 
    * 二、調用微信支付接口
    * 三、生成H5中使用的簽名內容
    */
    public function wx()
    {
        $wxpay = new Wxpay();
        $openid = $wxpay->openid();
        $pay = $wxpay->payForWeixin($openid,date('YmdHis').rand(1,5),'0.1');
        $paySign =strtoupper(MD5('appId='.$pay['appId'].'&nonceStr='.$pay['nonceStr'].'&package='.$pay['package'].'&signType=MD5&timeStamp='.$pay['timeStamp'].'&key=536*****9e8'));
         $h5 = array(
            'appId'     => $pay['appId'],
            'timeStamp' => $pay['timeStamp'],
            'nonceStr'  => $pay['nonceStr'],
            'package'   => $pay['package'],
            'signType'  => $pay['signType'],
            'paySign'   => $paySign
        );
        $this->assign('wxpay',$h5);
        return view();
    }
}

三、HTML中調用微信支付，wx.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>訂單示例</title>
</head>
<body>

<script type="text/javascript">
    function onBridgeReady(){
        WeixinJSBridge.invoke(
            'getBrandWCPayRequest', {
                "appId":"{$wxpay['appId']}",
                "timeStamp":"{$wxpay['timeStamp']}",
                "nonceStr":"{$wxpay['nonceStr']}",
                "package":"{$wxpay['package']}",
                "signType":"MD5",
                "paySign":"{$wxpay['paySign']}"
            },
            function(res){
                if(res.err_msg == "get_brand_wcpay_request:ok" ){
                    // 使用以上方式判斷前端返回,微信團隊鄭重提示：
                    //res.err_msg將在用戶支付成功后返回ok，但并不保證它絕對可靠。
                }
            });
    }
    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>
</body>
</html>

四、接收微信支付返回結果,支付時設置的notify_url值，確保此鏈接外網能訪問。wxpaynofiy.php

<?php
namespace app\home\controller;
class Wxpaynofiy
{
     public function notify()
    {
        $xml = isset($GLOBALS["HTTP_RAW_POST_DATA"]) ? $GLOBALS['HTTP_RAW_POST_DATA'] : file_get_contents("php://input");
        $data = xmlToArray($xml);
        if($data['return_code'] == 'SUCCESS' && $data['result_code'] == 'SUCCESS'){
            if($this->checkSign($data)) {
                $transaction_id = $data['transaction_id'];      //微信支付訂單號
                $out_trade_no   = $data['out_trade_no'];        //商家訂單號
                $this->errorLog('微信支付返回結果,微信支付訂單號：'.$transaction_id.'，商家訂單號：'.$out_trade_no,[]);

            } else {
                $this->errorLog('微信支付返回結果簽名驗證失敗',$data);
            }
        } else {
            $this->errorLog('微信支付返回結果',$data);
        }
        echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';
    }

    /*
     * 驗證簽名
     * @params array $result : 微信支付成功返回的結果數組
     * return bool $ret : 成功true，失敗false
     * */
    private function checkSign(array $data)
    {
        $str = '';
        ksort($data);
        foreach ($data as $k => $v) {
            if($k != 'sign') $str .= $k.'='.$v.'&';
        }
        $temp = $str . 'key=5363******49e8';     //key：商戶支付密鑰
        $sign = strtoupper(md5($temp));
        return $sign == $data['sign'] ? true : false;
    }

    private function errorLog($msg,$ret)
    {
        file_put_contents(ROOT_PATH . 'runtime/error/wxpaynofiy.log', "[" . date('Y-m-d H:i:s') . "] ".$msg."," .json_encode($ret).PHP_EOL, FILE_APPEND);
    }
}

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微信支付統一下單，用PHP如何完成？（代碼全）

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