PHP 微信支付类 demo

<?php
class wxpayservice
{
  protected $mchid;
  protected $appid;
  protected $key;
  public function __construct($mchid, $appid, $key)
  {
    $this->mchid = $mchid; // 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
    $this->appid = $appid; //公众号appid 通过微信支付商户资料审核后邮件发送
    $this->key = $key;   //https://pay.weixin.qq.com 帐户设置-安全设置-api安全-api密钥-设置api密钥
  }
  /**
   * @param string $openid 调用【网页授权获取用户信息】接口获取到用户在该公众号下的openid
   * @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 $notifyurl 支付结果通知url 不要有问号
   *   https://mp.weixin.qq.com/ 微信支付-开发配置-测试目录
   *   测试目录 http://mp.izhanlue.com/paytest/  最后需要斜线，(需要精确到二级或三级目录)
   * @return string
   */
  public function createjsbizpackage($openid, $totalfee, $outtradeno, $ordername, $notifyurl, $timestamp)
  {
    $config = array(
      'mch_id' => $this->mchid,
      'appid' => $this->appid,
      'key' => $this->key,
    );
    $unified = array(
      'appid' => $config['appid'],
      'attach' => '支付',             //商家数据包，原样返回
      'body' => $ordername,
      'mch_id' => $config['mch_id'],
      'nonce_str' => self::createnoncestr(),
      'notify_url' => $notifyurl,
      'openid' => $openid,            //rade_type=jsapi，此参数必传
      'out_trade_no' => $outtradeno,
      'spbill_create_ip' => '127.0.0.1',
      'total_fee' => intval($totalfee * 100),       //单位 转为分
      'trade_type' => 'jsapi',
    );
    $unified['sign'] = self::getsign($unified, $config['key']);
    $responsexml = self::curlpost('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arraytoxml($unified));
    /*
    <xml>
    <return_code><![cdata[success]]></return_code>
    <return_msg><![cdata[ok]]></return_msg>
    <appid><![cdata[wx00e5904efec77699]]></appid>
    <mch_id><![cdata[1220647301]]></mch_id>
    <nonce_str><![cdata[1lhbrosdmqfxowqr]]></nonce_str>
    <sign><![cdata[aca7bc8a9164d1fbed06c7dfc13ec839]]></sign>
    <result_code><![cdata[success]]></result_code>
    <prepay_id><![cdata[wx2015032016590503f1bcd9c30421762652]]></prepay_id>
    <trade_type><![cdata[jsapi]]></trade_type>
    </xml>
    */
    $unifiedorder = simplexml_load_string($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($unifiedorder->err_code);
      /*
      noauth 商户无此接口权限
      notenough 余额不足
      orderpaid 商户订单已支付
      orderclosed 订单已关闭
      systemerror 系统错误
      appid_not_exist   appid不存在
      mchid_not_exist mchid不存在
      appid_mchid_not_match appid和mch_id不匹配
      lack_params 缺少参数
      out_trade_no_used 商户订单号重复
      signerror 签名错误
      xml_format_error xml格式错误
      require_post_method 请使用post方法
      post_data_empty post数据为空
      not_utf8 编码格式错误
      */
    }
    //$unifiedorder->trade_type 交易类型 调用接口提交的交易类型，取值如下：jsapi，native，app
    //$unifiedorder->prepay_id 预支付交易会话标识 微信生成的预支付回话标识，用于后续接口调用中使用，该值有效期为2小时
    //$unifiedorder->code_url 二维码链接 trade_type为native是有返回，可将该参数值生成二维码展示出来进行扫码支付
    $arr = array(
      "appid" => $config['appid'],
      "timestamp" => $timestamp,
      "noncestr" => self::createnoncestr(),
      "package" => "prepay_id=" . $unifiedorder->prepay_id,
      "signtype" => 'md5',
    );
    $arr['paysign'] = self::getsign($arr, $config['key']);
    return $arr;
  }
  public function notify()
  {
    $config = array(
      'mch_id' => $this->mchid,
      'appid' => $this->appid,
      'key' => $this->key,
    );
    $poststr = $globals["http_raw_post_data"];
    //error_log($poststr, 3, './str.txt');
    /*
    $poststr = '<xml>
    <appid><![cdata[wx00e5904efec77699]]></appid>
    <attach><![cdata[支付测试]]></attach>
    <bank_type><![cdata[cmb_credit]]></bank_type>
    <cash_fee><![cdata[1]]></cash_fee>
    <fee_type><![cdata[cny]]></fee_type>
    <is_subscribe><![cdata[y]]></is_subscribe>
    <mch_id><![cdata[1220647301]]></mch_id>
    <nonce_str><![cdata[a0tz41phihm8zfmo]]></nonce_str>
    <openid><![cdata[ou3oct5o46pumn7ie87wcoyzy9r0]]></openid>
    <out_trade_no><![cdata[550bf2990c51f]]></out_trade_no>
    <result_code><![cdata[success]]></result_code>
    <return_code><![cdata[success]]></return_code>
    <sign><![cdata[f6f519b4dd8db978040f8c866c1e6250]]></sign>
    <time_end><![cdata[20150320181606]]></time_end>
    <total_fee>1</total_fee>
    <trade_type><![cdata[jsapi]]></trade_type>
    <transaction_id><![cdata[1008840847201503200034663980]]></transaction_id>
    </xml>';
    */
    $postobj = simplexml_load_string($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) {
      // $mch_id = $postobj->mch_id; //微信支付分配的商户号
      // $appid = $postobj->appid; //微信分配的公众账号id
      // $openid = $postobj->openid; //用户在商户appid下的唯一标识
      // $transaction_id = $postobj->transaction_id;//微信支付订单号
      // $out_trade_no = $postobj->out_trade_no;//商户订单号
      // $total_fee = $postobj->total_fee; //订单总金额，单位为分
      // $is_subscribe = $postobj->is_subscribe; //用户是否关注公众账号，y-关注，n-未关注，仅在公众账号类型支付有效
      // $attach = $postobj->attach;//商家数据包，原样返回
      // $time_end = $postobj->time_end;//支付完成时间
      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 $xml;
  }
  /**
   * 例如：
   * appid：  wxd930ea5d5a258f4f
   * mch_id：  10000100
   * device_info： 1000
   * body：  test
   * nonce_str： ibuaivckdprxkhja
   * 第一步：对参数按照 key=value 的格式，并按照参数名 ascii 字典序排序如下：
   * stringa="appid=wxd930ea5d5a258f4f&body=test&device_info=1000&mch_i
   * d=10000100&nonce_str=ibuaivckdprxkhja";
   * 第二步：拼接支付密钥：
   * stringsigntemp="stringa&key=192006250b4c09247ec02edce69f6a2d"
   * sign=md5(stringsigntemp).touppercase()="9a0a8659f005d6984697e2ca0a9cf3b7"
   */
  public static function getsign($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;
  }
}