php微信支付代码

<?php  

 

    /**
 *微信下单
 */
 function wxorders(){

        ini_set("display_errors", "On");
        error_reporting(E_ALL | E_STRICT);

  $kilometre = $_POST['kilometre'];
  $km = $kilometre/1000;//米数转化成公里
        if(empty($_POST['session_key'])){
            $msg['status'] = 'error';
            $msg['msg'] = 'session_key 不能为空';
            echo json_encode($msg);exit();
        }
  //提交订单
  $data = array(
   'start_address'=>$_POST['startLoca'],//出发地址
   'end_address'=>$_POST['destLoca'],//目的地
   'start_time'=>strtotime(str_replace('.','-',$_POST['startTime'])),//开始时间
   'end_time'=>strtotime(str_replace('.','-',$_POST['endTime'])),//结束时间
   'km'=>$km,//公里数
   'seat'=>$_POST['seat'],//座位
   'borad_price'=>$_POST['basicPrice'],//上车价
   'per_km'=>$_POST['perKiloPrice'],//每公里单价
   'total_price'=>$_POST['cost'],//总价钱
   'contact'=>$_POST['name'],//联系人名
   'mobile'=>$_POST['phone'],//联系电话
   'status'=>'1',//状态
   'create_time'=>time(),//提交时间
   'type'=>$_POST['type'],//租车类型  小bus 大巴等
   'kelala'=>$_POST['session_key'],//标识符
   );
  $total_price = $_POST['cost'];//总价赋值
        //插入订单记录，此处状态为待付款
  $id = $this->baseModel->add('orders',$data);
        //根据标识符查询当前账号的openid
        $kelala = $_POST['session_key'];//用户的唯一标识
        $user = $this->baseModel->getRow('user','*',array('kelala'=>$kelala));
        if(empty($user)){
            $msg['status'] = 'error';
            $msg['msg'] = '用户信息不能为空';
            echo json_encode($msg);exit();
        }
        if(empty($user['openid'])){
            $msg['status'] = 'error';
            $msg['msg'] = 'openid不能为空';
            echo json_encode($msg);exit();
        }
     //调用下单接口  $res为新订单的id
  $r = $this->wxpay($total_price,$user['openid'],$id);
        // if(empty($r['prepay_id'])){
        //     $msg['status'] = 'error';
        //     $msg['msg'] = '微信调起失败';
        //     $msg['data'] = $r;
        //     echo json_encode($msg);exit();
        // }
        //这里是返回给前端的参数，也是这篇代码的最后一句，返回之后，前端就可以调用微信支付弹出框了
        echo json_encode($r);exit();
 }

    /**
    *微信下单
    *@param total_price 下单金额 单位为/元
    *@return 这一步返回prepay_id
    *@param $id为新订单的id
    */
    function wxpay($total_price,$openid,$id){
        //拼接商品订单号
        $body = '测试商品';
        //这个是订单号，也是一个订单的唯一标识，支付成功会返回过来
        $out_trade_no = date("YmdHis") . rand(100, 999);
        // //更新微信返回的订单号
        $this->baseModel->updateById('orders',array('out_trade_no'=>$out_trade_no),$id);
          $order = [
            'appid'=>'',
            'mch_id'=>'1499532322',//这个是商户id，是在商户平台绑定银行卡后的id,给谁付钱就是谁的商户id
            'openid'=>$openid,
            'nonce_str'=>$this->rand2(10),
            'body'=>'测试商品',
            'out_trade_no'=>$out_trade_no,//商户唯一订单号，可包含字母序
            'total_fee'=>(string)$total_price*100,//订单金额，单位/分所以乘以100
            'spbill_create_ip'=>$_SERVER['REMOTE_ADDR'],
            //产生订单号的服务器IP
            'notify_url'=>'https://www.kelalazuche.com/notice',//接受微信异步通知地址
            'trade_type'=>'JSAPI',//交易类型
        ];
        //MD5处理，默认支持MD5
        // $sign = md5($sign);
        $order['sign'] = $this->getSign($order);
        //转换成一维XML格式
        $xml = '<xml>';
        foreach($order as $k=>$v){
            $xml.='<'.$k.'><![CDATA['.$v.']]></'.$k.'>';
        }
        $xml.='</xml>';
        $KEY = '12ed7bd47d66f4ef7865f79b2194a94b';//加密的字符串
        //CURL会话
        $ch = curl_init();
        // 设置curl允许执行的最长秒数
        curl_setopt($ch, CURLOPT_TIMEOUT, 3);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);
        // 获取的信息以文件流的形式返回，而不是直接输出。
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
        //发送一个常规的POST请求。
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_URL, 'https://api.mch.weixin.qq.com/pay/unifiedorder');
        //要传送的所有数据
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        // 执行操作
        $response = curl_exec($ch);
        //将xml格式的$response 转成数组
        $response = json_decode( json_encode( simplexml_load_string($response, 'SimpleXMLElement', LIBXML_NOCDATA) ), true );
        if($response['return_code'] == "SUCCESS" && $response['result_code'] == "SUCCESS"){

            //根据微信支付返回的结果进行二次签名
            //二次签名所需的随机字符串
            $order["nonceStr"] = $this->rand2(10);//随机字符串
            //二次签名所需的时间戳
            $order['timeStamp'] = time()."";
            //二次签名剩余参数的补充
            $secondSignArray = array(
                    "appId"=>$order['appid'],
                    "nonceStr"=>$order['nonceStr'],
                    //"package"=>"Sign=WXPay",
                    "package"=>"prepay_id=".$response['prepay_id'],
                    "signType"=>"MD5",
                    "timeStamp"=>$order['timeStamp'],
            );
            $data = $secondSignArray;
            $recharge_num = $order["out_trade_no"];
            $data['paySign'] =  $this->makeSign($secondSignArray,$KEY);
            $data['prepay_id'] = $response['prepay_id'];

            $data['out_trade_no'] = $out_trade_no;
           
            // $output = array('data'=>$data ,'info'=>"success" ,'code'=>"200" ,'order_number'=>$recharge_num);
            // return($output);
            return $data;

        }else{
            //返回错误信息
            $output = array('data'=>false ,'info'=>"error" ,'code'=>"100" ,'order_number'=>false);
            echo json_encode($output);exit();
        }
        // return $response;
    }

    /**
    *生成签名算法
    */
    function getSign($array)
    {  
        //这个是在平台自己设置的，一个32位的字符串，应该是秘钥（私钥）什么的
        $pay_key = "12ed7bd47d66f4ef7865f79b2194a94b";
        unset($array['sign']);
        ksort($array);
        $stringA = urldecode(http_build_query($array));
        $stringSignTemp="$stringA&key=".$pay_key;
        return strtoupper(md5($stringSignTemp));
    }

    /**
    *生成不重复的字符串
    *@param $len 字符串长度
    *@return 随机字符串
    */
    function rand2($len)
       {
          $chars='ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz';
          $string=time();
          for(;$len>=1;$len--)
          {
              $position=rand()%strlen($chars);
              $position2=rand()%strlen($string);
              $string=substr_replace($string,substr($chars,$position,1),$position2,0);
         }
         return $string;
    }

    /**
     * 生成签名, $KEY就是支付key
     * @return 签名
     */
    function MakeSign( $params,$KEY){
        //签名步骤一：按字典序排序数组参数
        ksort($params);
        $string = $this->ToUrlParams($params);  //参数进行拼接key=value&k=v
        //签名步骤二：在string后加入KEY
        $string = $string . "&key=".$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;
    }

     function ToUrlParams( $params ){
        $string = '';
        if( !empty($params) ){
            $array = array();
            foreach( $params as $key => $value ){
                $array[] = $key.'='.$value;
            }
            $string = implode("&",$array);
        }
        return $string;
    }

     function xml2array($xml){
        $p = xml_parser_create();
        xml_parse_into_struct($p, $xml, $vals, $index);
        xml_parser_free($p);
        $data = "";
        foreach ($index as $key=>$value) {
            if($key == 'xml' || $key == 'XML') continue;
            $tag = $vals[$value[0]]['tag'];
            $value = $vals[$value[0]]['value'];
            $data[$tag] = $value;
        }
        return $data;
    }

    /**
    *发送请求的代码
    */
    function http_request($url,$data = null,$headers=array())
    {
        $curl = curl_init();
        if( count($headers) >= 1 ){
            curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
        }
        curl_setopt($curl, CURLOPT_URL, $url);
   
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
   
        if (!empty($data)){
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($curl);
        curl_close($curl);
        return $output;
    }