基於php開發app微信支付接口

這篇文章主要介紹了關於基於php開發app微信支付接口，有著一定的參考價值，現在分享給大家，有需要的朋友可以參考一下

定義好商家支付資訊 

define(APPID, $payment ['appId']); // appid

 define(APPSECRET, $payment ['appSecret']); // appSecret

 define(MCHID , $payment ['partnerId']);//商家號碼
  define(KEY, $payment ['partnerKey']); // 通加密字串

   define(NOTIFY_URL, $return_url ); // 成功回呼url

//签名所需
   $signArray = array(
       'appid' => $payment['appId'], //appid
       'mch_id' => $payment['partnerId'],
       'nonce_str' => self::createNoncestr(),
       'out_trade_no' => $order['order_sn'],
       'body' => $order['body'],
       "total_fee" => $order ['order_amount'],
       "notify_url" => $return_url,
       "spbill_create_ip" => $_SERVER["REMOTE_ADDR"],
       "trade_type" => "APP",
   );

$sign=self::getSign($signArray);
       //统一下单
       $goPay = array(
           'appid' => $payment['appId'], //appid
           'mch_id' => $payment['partnerId'],
           'nonce_str' => $signArray['nonce_str'], //生成随机字符串
           'sign' => $sign,
           'out_trade_no' => $order['order_sn'],
           "total_fee" => $order ['order_amount'],
            'body' => $order['body'],
           "notify_url" => $return_url,
            "spbill_create_ip" => $_SERVER["REMOTE_ADDR"],
           "trade_type" => "APP",
       );
       //转化xml
       $goPayXml=self::arrayToXml($goPay);
       $result=self::sendPrePayCurl($goPayXml);
       return $result;

產生隨機字串函數

//随机生成字符串
public function createNoncestr($length = 32) {
    $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
    $str = "";
    for ($i = 0; $i < $length; $i++) {
        $str.= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
    }
    return $str;
}

簽名函數

/**
 *  作用：生成签名
 */
public function getSign($Obj) {
    foreach ($Obj as $k => $v) {
        //if($k == 'code') continue;
        //if($k == 'from') continue;
        $Parameters[$k] = $v;
    }
    //签名步骤一：按字典序排序参数
    ksort($Parameters);
    $String = self::formatBizQueryParaMap($Parameters, false);
    //echo &#39;【string1】&#39;.$String.&#39;</br>&#39;;
    //签名步骤二：在string后加入KEY
    $String = $String . "&key=" . KEY;
    //echo "【string2】".$String."</br>";
    //签名步骤三：MD5加密
    $String = md5($String);
    //echo "【string3】 ".$String."</br>";
    //签名步骤四：所有字符转为大写
    $result_ = strtoupper($String);
    //echo "【result】 ".$result_."</br>";
    return $result_;
}

//格式化签名所需参数
   public function formatBizQueryParaMap($paraMap, $urlencode) {
       $buff = "";
       ksort($paraMap);
       foreach ($paraMap as $k => $v) {
           if ($urlencode) {
               $v = urlencode($v);
           }
           //$buff .= strtolower($k) . "=" . $v . "&";
           $buff .= $k . "=" . $v . "&";
       }
       $reqPar;
       if (strlen($buff) > 0) {
           $reqPar = substr($buff, 0, strlen($buff) - 1);
       }
       return $reqPar;
   }

把所要請求參數組裝xml

/**
 *  作用：array转xml,把请求参数组装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;
}

//通过curl发送数据给微信接口的函数
    public function sendPrePayCurl($xmlData) {
        $url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
        $header[] = "Content-type: text/xml";
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $xmlData);
        $data = curl_exec($curl);
        if (curl_errno($curl)) {
            print curl_error($curl);
        }
        curl_close($curl);
        return self::XMLDataParse($data);
    }

//xml格式数据解析函数
    public static function XMLDataParse($data) {
        $msg = array();
        $msg = (array) simplexml_load_string($data, 'SimpleXMLElement', LIBXML_NOCDATA);
        return $msg;
    }

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