lidadz_admin/application/common/library/WxPay.php

<?php
namespace app\common\library;

use app\common\model\Config;
use think\Controller;
use think\Facade;
use EasyWeChat\Factory;

class WxPay extends Controller
{
    /*
   配置参数
   */
    public function __construct()
    {
       // $this->appid = Config::get_values('small_wechat_id');
        $this->appid = Config::get_values('wechat_appid');
        $this->api_key = Config::get_values('wechat_mch_key');
        $this->mch_id = Config::get_values('wechat_mch_id');

    }

    public function retrunconfig(){
        $config = [
            'app_id' => Config::get_values('wechat_appid'),
            'mch_id' =>Config::get_values('wechat_mch_id'),
            'key' =>Config::get_values('wechat_mch_key')
        ];
        return $config;
    }

    //获取预支付订单
    public function getPrePayOrder($body, $out_trade_no, $total_fee, $notify_url,$come,$openid){

        $url = "https://api.mch.weixin.qq.com/pay/unifiedorder";

        $onoce_str = $this->getRandChar(32);

        $data["appid"] =  $this->appid;
        $data["body"] = $body;
        $data["mch_id"] = $this->mch_id;
        $data["nonce_str"] = $onoce_str;
        $data["notify_url"] = $notify_url;
        $data["out_trade_no"] = $out_trade_no;
        $data["spbill_create_ip"] = $this->get_client_ip();
        $data["total_fee"] = floatval($total_fee);
        //$data["trade_type"] = $come=='weixin' ? "JSAPI" : "APP";
        $data["trade_type"] = "APP";
        $data['sign_type'] = "MD5";
//        if ($come=='weixin'){
//            $data['openid'] = $openid;
//        }
        $s = $this->getSign($data);

        $data["sign"] = $s;

        $xml = $this->arrayToXml($data);

        $response = $this->postXmlCurl($xml, $url);

        //将微信返回的结果xml转成数组
       //return $this->xmlstr_to_array($response);
        return $this->xmlToArray($response);
    }


    public function wxrefund($out_trade_no,$out_refund_no,$total_fee,$refund_fee)
    {
        $param = array(
            'appid'=> $this->appid,
            'mch_id'=> $this->mch_id,
            'nonce_str'=>  $this->getRandChar(32),
            'out_trade_no'=>$out_trade_no,
            'out_refund_no'=>$out_refund_no,//订单号
          //  'transaction_id'=> $transactionId,//微信订单号
            'total_fee'=> $total_fee*100,
            'refund_fee'=>$refund_fee*100
        );

        $param['sign'] = $this->getSign($param);
        $xmldata = $this->arrayToXml($param);
        $xmlresult = $this->postXmlSSLCurl($xmldata,'https://api.mch.weixin.qq.com/secapi/pay/refund');
        $result = $this->xmlToArray($xmlresult);
        return $result;
    }


    //执行第二次签名，才能返回给客户端使用
    public function getOrder($prepayId){
        $data["appid"] = $this->appid;
        $data["noncestr"] = $this->getRandChar(32);
        $data["package"] = "Sign=WXPay";
       // $data['package'] = "prepay_id=".$prepayId;
        $data["partnerid"] = $this->mch_id;
        $data["prepayid"] = $prepayId;
        $data["signType"] = "MD5";
        $data["timestamp"] = '' . time() . '';
        $s = $this->getSign($data, false);
        $data["sign"] = $s;

        return $data;
    }

    /*
        生成签名
    */
    function getSign($Obj)
    {
        foreach ($Obj as $k => $v)
        {
            $Parameters[strtolower($k)] = $v;
        }
        //签名步骤一：按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters, false);
        //echo "【string】 =".$String."</br>";
        //签名步骤二：在string后加入KEY
        $String = $String."&key=".$this->api_key;
//        echo "<textarea style='width: 50%; height: 150px;'>$String</textarea> <br />";
        //签名步骤三：MD5加密
        $result_ = strtoupper(md5($String));
        return $result_;
    }




    //获取指定长度的随机字符串
    function getRandChar($length){
        $str = null;
        $strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
        $max = strlen($strPol)-1;

        for($i=0;$i<$length;$i++){
            $str.=$strPol[rand(0,$max)];//rand($min,$max)生成介于min和max两个数之间的一个随机整数
        }

        return $str;
    }

    //数组转xml
    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;
    }

    //post https请求，CURLOPT_POSTFIELDS xml格式
    function postXmlCurl($xml,$url,$second=30)
    {
        //初始化curl
        $ch = curl_init();
        //超时时间
        curl_setopt($ch,CURLOPT_TIMEOUT,$second);
        //这里设置代理，如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch,CURLOPT_URL, $url);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
        //设置header
        curl_setopt($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);
        //运行curl
        $data = curl_exec($ch);
        //返回结果
        if($data)
        {
            curl_close($ch);
            return $data;
        }
        else
        {
            $error = curl_errno($ch);
            echo "curl出错，错误码:$error"."<br>";
            echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
            curl_close($ch);
            return false;
        }
    }



   //需要使用证书的请求
    private function postXmlSSLCurl($xml,$url,$second=30)
    {
        $ch = curl_init();
        //超时时间
        curl_setopt($ch,CURLOPT_TIMEOUT,$second);
        //这里设置代理，如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch,CURLOPT_URL, $url);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
        //设置header
        curl_setopt($ch,CURLOPT_HEADER,FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch,CURLOPT_RETURNTRANSFER,TRUE);
        //设置证书
        //使用证书：cert 与 key 分别属于两个.pem文件
        //默认格式为PEM，可以注释
        curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');
        curl_setopt($ch,CURLOPT_SSLCERT, dirname(__DIR__) . '/wxcert/apiclient_cert.pem');
        //默认格式为PEM，可以注释
        curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');
        curl_setopt($ch,CURLOPT_SSLKEY, dirname(__DIR__) . '/wxcert/apiclient_key.pem');
        //post提交方式
        curl_setopt($ch,CURLOPT_POST, true);
        curl_setopt($ch,CURLOPT_POSTFIELDS,$xml);
        $data = curl_exec($ch);
        //返回结果
        if($data){
            curl_close($ch);
            return $data;
        }
        else {
            $error = curl_errno($ch);
            echo "curl出错，错误码:$error"."<br>";
            curl_close($ch);
            return false;
        }
    }
    /*
        获取当前服务器的IP
    */
    function get_client_ip()
    {
        if ($_SERVER['REMOTE_ADDR']) {
            $cip = $_SERVER['REMOTE_ADDR'];
        } elseif (getenv("REMOTE_ADDR")) {
            $cip = getenv("REMOTE_ADDR");
        } elseif (getenv("HTTP_CLIENT_IP")) {
            $cip = getenv("HTTP_CLIENT_IP");
        } else {
            $cip = "unknown";
        }
        return $cip;
    }

    //将数组转成uri字符串
    function formatBizQueryParaMap($paraMap, $urlencode)
    {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v)
        {
            if($urlencode)
            {
                $v = urlencode($v);
            }
            $buff .= strtolower($k) . "=" . $v . "&";
        }
        $reqPar;
        if (strlen($buff) > 0)
        {
            $reqPar = substr($buff, 0, strlen($buff)-1);
        }
        return $reqPar;
    }

    /**
    xml转成数组
     */
//    function xmlstr_to_array($xmlstr) {
//        $doc = new DOMDocument();
//        $doc->loadXML($xmlstr);
//        return $this->domnode_to_array($doc->documentElement);
//    }
    function domnode_to_array($node) {
        $output = array();
        switch ($node->nodeType) {
            case XML_CDATA_SECTION_NODE:
            case XML_TEXT_NODE:
                $output = trim($node->textContent);
                break;
            case XML_ELEMENT_NODE:
                for ($i=0, $m=$node->childNodes->length; $i<$m; $i++) {
                    $child = $node->childNodes->item($i);
                    $v = $this->domnode_to_array($child);
                    if(isset($child->tagName)) {
                        $t = $child->tagName;
                        if(!isset($output[$t])) {
                            $output[$t] = array();
                        }
                        $output[$t][] = $v;
                    }
                    elseif($v) {
                        $output = (string) $v;
                    }
                }
                if(is_array($output)) {
                    if($node->attributes->length) {
                        $a = array();
                        foreach($node->attributes as $attrName => $attrNode) {
                            $a[$attrName] = (string) $attrNode->value;
                        }
                        $output['@attributes'] = $a;
                    }
                    foreach ($output as $t => $v) {
                        if(is_array($v) && count($v)==1 && $t!='@attributes') {
                            $output[$t] = $v[0];
                        }
                    }
                }
                break;
        }
        return $output;
    }
//    public function xmltoarray( $xml )
//    {
//        $arr = $this->xml_to_array($xml);
//        $key = array_keys($arr);
//        return $arr[$key[0]];
//    }

    /**
     * 	作用：将xml转为array
     */
    public function xmlToArray($xml)
    {
        //将XML转为array
        $array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
        return $array_data;
    }


    public function xml_to_array( $xml )
    {
        $reg = "/<(\\w+)[^>]*?>([\\x00-\\xFF]*?)<\\/\\1>/";
        if(preg_match_all($reg, $xml, $matches))
        {
            $count = count($matches[0]);
            $arr = array();
            for($i = 0; $i < $count; $i++)
            {
                $key = $matches[1][$i];
                $val = $this->xml_to_array( $matches[2][$i] );  // 递归
                if(array_key_exists($key, $arr))
                {
                    if(is_array($arr[$key]))
                    {
                        if(!array_key_exists(0,$arr[$key]))
                        {
                            $arr[$key] = array($arr[$key]);
                        }
                    }else{
                        $arr[$key] = array($arr[$key]);
                    }
                    $arr[$key][] = $val;
                }else{
                    $arr[$key] = $val;
                }
            }
            return $arr;
        }else{
            return $xml;
        }
    }

}