微信小程序支付功能--优化

//增加订单public function order_pay(Request $request){    $data = [        'express' => $request->input('express'),        'express_id' => $request->input('express_id'),        'openid' => $request->input('openid'),        'express_sn' => $request->input('express_sn'),        'take_number' => $request->input('take_number'),        'price' => $request->input('price'),    ];    is_empty_array_data($data);    $data['out_trade_no'] =md5(uniqid() . microtime());    $order_info= OrderModel::create($data);    $order_id=$order_info->getQueueableId();    $this->getPaySign($order_id);}//获取支付需要的参数public function getPaySign($order_id){    //$order_id = 54 ;    $order_info = OrderModel::find($order_id);    $ip = $_SERVER["REMOTE_ADDR"];    $notify_url = 'http://'.$_SERVER['HTTP_HOST'].'/api/payok';    $pay_data= PayModel::find(1);    $data = [        //'appid' => 'wxf0d27e41678c566c',        'appid'            => $pay_data->app_id,        'body'             => '快递下单消费',        //'mch_id'         => '1484855592',        'mch_id'           => $pay_data->med_id,        'nonce_str'        => md5(date('YmdHis') . time() . rand(1000, 9999)),        'notify_url'       => $notify_url,        'openid'           => $order_info->openid,        'out_trade_no'     => $order_info->out_trade_no,        'spbill_create_ip' => $ip,        'total_fee'        => ($order_info->price)*100,        'trade_type'       => 'JSAPI'    ];    //形成sign    $string = $this->getSign($data).'key='.$pay_data->med_secect;    $stringTemp = MD5($string);    $sign = strtoupper($stringTemp);    //准备请求prepay接口    $data['sign'] = $sign;    $str_xml = "<xml>";    foreach ($data as $key => $val) {        $str_xml .= "<" . $key . ">" . $val . "</" . $key . ">";    }    $str_xml .= "</xml>";    $prepay_url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';    //请求接口并且解析xml    $result = $this->xmlDecode($this->httpCurl($prepay_url,$str_xml));    if ($result['return_code'] !== 'SUCCESS' || $result['result_code'] !== 'SUCCESS') {        return response()->json(['status'=>200,'msg'=>$result]);    }    $params = [        'appId'     => $data['appid'],        'nonceStr'  => $data['nonce_str'],        'package'   => 'prepay_id='.$result['prepay_id'],        'signType'  => 'MD5',        'timeStamp' => (string)time()    ];    //拼接前端需要参数    $stringxml = $this->getSign($params).'key='.$pay_data->med_secect;    $stringxml = MD5($stringxml);    $sign2 = strtoupper($stringxml);    $pay_result['paySign']   = $sign2;    $pay_result['timeStamp'] = $params['timeStamp'];    $pay_result['nonceStr']  = $params['nonceStr'];    $pay_result['package']   = $params['package'];    $pay_result['signType']  = 'MD5';    return response()->json(['status'=>200,'msg'=>$pay_result]);}protected function getSign($arr){    ksort($arr);    $string = '';    foreach ($arr as $k => $v) {        if ($k != "sign" && $v != "" && !is_array($v)) {            $string .= $k . "=" . $v . "&";        }    }    return $string;}protected function xmlDecode($xml){    $message = (array)simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);    return $message;}protected function httpCurl($url,$data){    $ch = curl_init();    curl_setopt($ch, CURLOPT_URL, $url);    curl_setopt($ch, CURLOPT_HEADER, 0);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);    curl_setopt($ch, CURLOPT_POST, 1);    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);    curl_setopt(        $ch, CURLOPT_HTTPHEADER,        array(            'Content-Type: text'        )    );    $data = curl_exec($ch);    curl_close($ch);    return ($data);}