微信支付PHP服务端案例，实现APP或小程序接口调用支付接口

admin 发表于 2024-2-17 22:03:18

<?php
header("Content-type: text/html; charset=utf-8");
$orderBody = "test商品";
$tade_no = "abc_" . time();
$total_fee = 1;
$WxPayHelper = new WxPayHelper();
$response = $WxPayHelper->getPrePayOrder($orderBody, $tade_no, $total_fee);
   echo "<pre>";
   print_r($response);
   echo "</pre>";


/**
* 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' => "wxb96ecb1e787528b2", /*微信开放平台上的应用id*/
   'mch_id' => "1419216902", /*微信申请成功之后邮件中的商户id*/
   'api_key' => "dNOnNIu13zShL9FsF0c48NxRHwKGlUnS", /*在微信商户平台上自己设定的api密钥 32位*/
   'notify_url' => 'www.chaokongs.com' /*自定义的回调程序地址id*/
);

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(32);

   $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";
   $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"] = $this->getRandChar(32);;
   $data["package"] = "Sign=WXPay";
   $data["partnerid"] = $this->config['mch_id'];
   $data["prepayid"] = $prepayId;
   $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 = $v;
   }
   //签名步骤一：按字典序排序参数
   ksort($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['api_key'];

   //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($min,$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."><!]></".$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;
      }
      }
   }
   break;
   }
   return $output;
}
}
?>

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微信支付PHP服务端案例，实现APP或小程序接口调用支付接口