php实现微信原生支付（扫码支付）功能


            网上的很多PHP微信扫码支付接入教程都颇为复杂，且需要配置和引入较多的文件，本人通过整理后给出一个单文件版的，只有200行代码，希望可以给各位想接入微信扫码支付的带来些许帮助和借鉴意义。

直接运行该文件即可得到一个支付二维码的图片。

需要注意的事项：

1.该文件需放到支付授权目录下，可以在微信支付商户平台->产品中心->开发配置中设置。 

2.如提示签名错误可以通过微信支付签名验证工具进行验证：微信公众平台支付接口调试工具

代码如下：





<?php

header('Content-type:text/html; Charset=utf-8');

$mchid = 'xxxxx';     //微信支付商户号 PartnerID 通过微信支付商户资料审核后邮件发送

$appid = 'xxxxx'; //公众号APPID 通过微信支付商户资料审核后邮件发送

$apiKey = 'xxxxx';  //http://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥

$wxPay = new WxpayService($mchid,$appid,$apiKey);

$outTradeNo = uniqid();   //你自己的商品订单号

$payAmount = 0.01;     //付款金额，单位:元

$orderName = '支付测试';  //订单标题

$notifyUrl = 'http://www.xxx.com/wx/';   //付款成功后的回调地址(不要有问号)

$payTime = time();   //付款时间

$arr = $wxPay->createJsBizPackage($payAmount,$outTradeNo,$orderName,$notifyUrl,$payTime);

//生成二维码

$url = 'http://qr.liantu.com/api.php?text='.$arr['code_url'];

echo "<img src='{$url}' style='width:300px;'>";



class WxpayService

{

  protected $mchid;

  protected $appid;

  protected $apiKey;



  public function __construct($mchid, $appid, $key)

  {

    $this->mchid = $mchid;

    $this->appid = $appid;

    $this->apiKey = $key;

  }



  /**

   * 发起订单

   * @param float $totalFee 收款总费用 单位元

   * @param string $outTradeNo 唯一的订单号

   * @param string $orderName 订单名称

   * @param string $notifyUrl 支付结果通知url 不要有问号

   * @param string $timestamp 订单发起时间

   * @return array

   */

  public function createJsBizPackage($totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp)

  {

    $config = array(

      'mch_id' => $this->mchid,

      'appid' => $this->appid,

      'key' => $this->apiKey,

    );

    $orderName = iconv('GBK','UTF-8',$orderName);

    $unified = array(

      'appid' => $config['appid'],

      'attach' => 'pay',       //商家数据包，原样返回，如果填写中文，请注意转换为utf-8

      'body' => $orderName,

      'mch_id' => $config['mch_id'],

      'nonce_str' => self::createNonceStr(),

      'notify_url' => $notifyUrl,

      'out_trade_no' => $outTradeNo,

      'spbill_create_ip' => '127.0.0.1',

      'total_fee' => intval($totalFee * 100),    //单位 转为分

      'trade_type' => 'NATIVE',

    );

    $unified['sign'] = self::getSign($unified, $config['key']);

    $responseXml = self::curlPost('http://api.mch.weixin.qq.com/pay/unifiedorder', self::arrayToXml($unified));

    $unifiedOrder = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);

    if ($unifiedOrder === false) {

      die('parse xml error');

    }

    if ($unifiedOrder->return_code != 'SUCCESS') {

      die($unifiedOrder->return_msg);

    }

    if ($unifiedOrder->result_code != 'SUCCESS') {

      die($unifiedOrder->err_code);

    }

    $codeUrl = (array)($unifiedOrder->code_url);

    if(!$codeUrl[0]) exit('get code_url error');

    $arr = array(

      "appId" => $config['appid'],

      "timeStamp" => $timestamp,

      "nonceStr" => self::createNonceStr(),

      "package" => "prepay_id=" . $unifiedOrder->prepay_id,

      "signType" => 'MD5',

      "code_url" => $codeUrl[0],

    );

    $arr['paySign'] = self::getSign($arr, $config['key']);

    return $arr;

  }





  public function notify()

  {

    $config = array(

      'mch_id' => $this->mchid,

      'appid' => $this->appid,

      'key' => $this->apiKey,

    );

    $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];



    $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);

    if ($postObj === false) {

      die('parse xml error');

    }

    if ($postObj->return_code != 'SUCCESS') {

      die($postObj->return_msg);

    }

    if ($postObj->result_code != 'SUCCESS') {

      die($postObj->err_code);

    }

    $arr = (array)$postObj;

    unset($arr['sign']);

    if (self::getSign($arr, $config['key']) == $postObj->sign) {

      echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';

      return $postObj;

    }

  }



  /**

   * curl get

   *

   * @param string $url

   * @param array $options

   * @return mixed

   */

  public static function curlGet($url = '', $options = array())

  {

    $ch = curl_init($url);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

    curl_setopt($ch, CURLOPT_TIMEOUT, 30);

    if (!empty($options)) {

      curl_setopt_array($ch, $options);

    }

    //https请求 不验证证书和host

    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);

    $data = curl_exec($ch);

    curl_close($ch);

    return $data;

  }



  public static function curlPost($url = '', $postData = '', $options = array())

  {

    if (is_array($postData)) {

      $postData = http_build_query($postData);

    }

    $ch = curl_init();

    curl_setopt($ch, CURLOPT_URL, $url);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

    curl_setopt($ch, CURLOPT_POST, 1);

    curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);

    curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数

    if (!empty($options)) {

      curl_setopt_array($ch, $options);

    }

    //https请求 不验证证书和host

    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);

    $data = curl_exec($ch);

    curl_close($ch);

    return $data;

  }



  public static function createNonceStr($length = 16)

  {

    $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';

    $str = '';

    for ($i = 0; $i < $length; $i++) {

      $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);

    }

    return $str;

  }



  public static 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;

  }

  /**

   * 获取签名

   */

  public static function getSign($params, $key)

  {

    ksort($params, SORT_STRING);

    $unSignParaString = self::formatQueryParaMap($params, false);

    $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));

    return $signStr;

  }



  protected static function formatQueryParaMap($paraMap, $urlEncode = false)

  {

    $buff = "";

    ksort($paraMap);

    foreach ($paraMap as $k => $v) {

      if (null != $v && "null" != $v) {

        if ($urlEncode) {

          $v = urlencode($v);

        }

        $buff .= $k . "=" . $v . "&";

      }

    }

    $reqPar = '';

    if (strlen($buff) > 0) {

      $reqPar = substr($buff, 0, strlen($buff) - 1);

    }

    return $reqPar;

  }

}







github下载地址：weixinPay 

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