微信公众号扫码支付实现

一，定义参数，生成支付二维码
首先需要有公众平台账号，然后有商户号，开通微信认证。（传递的参数）

        $mchid = '15129*****';          //微信支付商户号$appid = 'wxaf785*********';  //公众号APPID $apiKey = 'ec4a3666***************';//API安全-API密钥$wxPay = new WxNative($mchid,$appid,$apiKey);$outTradeNo = uniqid();     //你自己的商品订单号$payAmount = 0.01;          //付款金额，单位:元$orderName = '预付定金';    //订单标题$notifyUrl = '自己的域名和目录/notify';    //付款成功后的回调地址$payTime = time();      //付款时间$arr = $wxPay->createJsBizPackage($payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);try{//记录订单信息（支付完成之后需要修改订单信息）$res=$this->save_order($outTradeNo,$payAmount,$orderName,$payTime,$uid);if (!$res){return json_return('1000','订单信息记录失败');}}catch (Exception $exception){return json_return('1000',$exception->getMessage());}
//生成二维码$url = 'https://www.kuaizhan.com/common/encode-png?large=true&data='.$arr['code_url'];echo "<img src='{$url}' style='width:300px;'><br>"

WxNative.php文件

 public function createJsBizPackage($totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp){$config = array('mch_id' => '151******','appid' => 'wxaf********','key' => 'ec4a366***************************',);//$orderName = iconv('GBK','UTF-8',$orderName);$unified = array('appid' => $config['appid'],'attach' => 'pay',  'body' => $orderName,'mch_id' => $config['mch_id'],'nonce_str' => self::createNonceStr(),'notify_url' => $notifyUrl,'out_trade_no' => $outTradeNo,'spbill_create_ip' => '127.0.0.1','total_fee' => intval($totalFee * 100),       //单位 转为分'trade_type' => 'NATIVE',);$unified['sign'] = self::getSign($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);}$codeUrl = (array)($unifiedOrder->code_url);if(!$codeUrl[0]) exit('get code_url error');$arr = array("appId" => $config['appid'],"timeStamp" => $timestamp,"nonceStr" => self::createNonceStr(),"package" => "prepay_id=" . $unifiedOrder->prepay_id,"signType" => 'MD5',"code_url" => $codeUrl[0],);$arr['paySign'] = self::getSign($arr, $config['key']);return $arr;}/** 更改记录订单信息（支付成功，更改订单信息）* */public function updateOrder($openid,$out_trade_no,$time_end,$transaction_id){//查看订单$order_id=db('bargain_money_order')->where(['order_no'=>$out_trade_no,'status'=>1])->field('id,user_id')->find();Log::write('订单id -------------------------'.$order_id['id']);if (empty($order_id)) return '';//更新订单信息//根据openid查看用户是否注册$user_id=db('user_app')->where(['openid'=>$openid])->value('id');$arr=['status'=>2,'update_time'=>time(),'pay_time'=>time(),'openid'=>$openid,'transaction_id'=>$transaction_id];if (!empty($user_id)){$arr['user_id']=$user_id;}$info=db('bargain_money_order')->where(['id'=>$order_id['id']])->update($arr);Log::write('更新订单返回---------------'.$info);if ($info){return $info;}else{return '';}}/*** 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, $options);}//https请求 不验证证书和hostcurl_setopt($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, $options);}//https请求 不验证证书和hostcurl_setopt($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;}

支付回调 Notify.php文件

  public function notify(){$config = array('mch_id' => '15*******','appid' => 'wxaf***********','key' => 'ec4a366&&&******************',);$postStr = file_get_contents('php://input');$postObj = simplexml_load_string($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;
//更改支付订单信息   $res=$this->updateOrder($arr['openid'],$arr['out_trade_no'],$arr['time_end'],$arr['transaction_id']);if($res) {$template_id = 'LcZolXlrNllDRced************';$openid = $arr['openid'];$data = ['first' => ['value' => '恭喜你定金支付成功',"color" => "#173177"],'keyword1' => ['value' => $arr['out_trade_no'],"color" => "#173177"],'keyword2' => ['value' => (intval($arr['total_fee']) / 100) . '元',"color" => "#173177"],'keyword3' => ['value' => date('Y年m月d H:i'),"color" => "#173177"],'remark' => ['value' => '欢迎使用健康',"color" => "#173177"]];//发送微信通知模板消息$result_msg = BaseCommon::send_wx_notify_message($template_id, $openid, $data);}unset($arr['sign']);if (self::getSign($arr, $config['key']) == $postObj->sign){echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';//  Log::write('成功回调------'.json_encode($postObj).'debug');return $postObj;}}

获取签名

 /*** 获取签名*/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;}

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