【微信开发】PHP服务端微信支付及支付回调

<?php
//ecshop项目文件，非必须
define('IN_ECS', true);
header("Content-type: text/html; charset=utf-8");

$user_id  = isset($_REQUEST['user_id']) ? trim($_REQUEST['user_id']) : '85';

//获取支付的金额

$money = isset($_REQUEST['money']) ? trim($_REQUEST['money']) : 1;

//微信中金额以分为单位，所以*100

$money = $money*100;

if($user_id == 0 || $money ==0){ $result = array('code' => 1,'data'=>'缺少参数' ); die(json_encode($result)); }else{
　//ecshop模板文件，非必须项，以实际项目为准
  require(dirname(__FILE__) . '../../includes/init.php');
  include_once(ROOT_PATH .'includes/lib_clips.php');
  $user_m = get_user_info($user_id);
}

$user_name = $user_m['user_name'];
$sn = chongzhi_sn();
$orderBody = "微信充值";
$tade_no = $sn;
$total_fee = $money;//以分为单位
$user_name = $user_name;
$WxPayHelper = new WxPayHelper();
//获取预支付订单号
$response = $WxPayHelper->getPrePayOrder($orderBody, $tade_no, $total_fee);
//print_r($response);

$bizcontent = array(
    'user_id'    => $user_id,
    'amount'  => $money/100,
    'user_name' => $user_m['user_name'],
    'payment' => "微信",
    'cz_sn'  => $sn,
    'add_time'  => gmtime()
);
$x = $WxPayHelper->getOrder($response);

if($GLOBALS['db']->autoExecute($ecs->table('user_chongzhi'), $bizcontent, 'INSERT')){
  if($x){
    $result = array('code'=>0,'data'=>$x);
  }else{
    $result = array('code'=>1,'data'=>'生成订单失败');
  }
  die(json_encode($result));
}else{
  $result = array('code'=>1,'data'=>'生成订单失败');
  die(json_encode($result));
}

// p_val($x);
 
/**
 * convert xml string to php array - useful to get a serializable value
 *
 * @param string $xmlstr
 * @return array
 * @author Adrien aka Gaarf
 */
 
class WxPayHelper{
    /*
    配置参数
    */
    var $config = array(
        'appid' => "wx123456",    /*微信开放平台上的应用id*/
        'mch_id' => "123456",   /*通过微信支付商户资料审核之后邮件中的商户id*/
        'key' => "123456",    /*在微信商户平台上自己设定的api密钥 32位*/
        'notify_url' => '项目地址/wxbac.php' /*自定义的回调程序地址*/
    );
 
    public function  __construct() {
 
    }
 
    //获取预支付订单
    public function getPrePayOrder($body, $out_trade_no, $total_fee){
        $url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
        $notify_url = $this->config["notify_url"];
 
        $onoce_str = $this->getRandChar(16);
 
        $data["appid"] = $this->config["appid"];
        $data["body"] = $body;
        $data["mch_id"] = $this->config['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"] = $total_fee;
        $data["trade_type"] = "APP";
        /*自定义*/
        //$data["user_name"] = $user_name;
        /*end*/
        $s = $this->getSign($data, false);
        $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);
    }
 
    //执行第二次签名，才能返回给客户端使用
    public function getOrder($prepayId){
        $data["appid"] = $this->config["appid"];
        $data["noncestr"] = $prepayId["nonce_str"];
        $data["package"] = "Sign=WXPay";
        $data["partnerid"] = $this->config['mch_id'];
        $data["prepayid"] = $prepayId["prepay_id"];
        $data["timestamp"] = (String)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->config['key'];
    
    
        // echo "<textarea style=' 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;
        }
    }
 
    /*
        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;
    }
}

function chongzhi_sn()
{
    /* 选择一个随机的方案 */
    mt_srand((double) microtime() * 1000000);
    return date('Ymd') . str_pad(mt_rand(1, 99999), 5, '0', STR_PAD_LEFT);
}
?>

　　支付回调页面

<?php
define('IN_ECS', true);

//微信返回的数据
$input = file_get_contents("php://input");

$myfile = fopen("wxtestfile.txt", "a");
fwrite($myfile, "
");
fwrite($myfile, $input);

if($input){
	$xml = simplexml_load_string($input);
	$money = (string)$xml->total_fee;
	$return_code = (string)$xml->return_code;
	$attach = (string)$xml->attach;
	$user_id = (string)$xml->user_id;
	$out_trade_no = (string)$xml->out_trade_no;
}

if($return_code){
	//业务处理
　　　　　　//修改订单/用户状态
　　　　　//业务处理
	echo 'success';
}else{
	echo 'fail';
}
fclose($myfile);

?>