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namespace Potting;

class WechatPay

{

  private static $mchid='';

  private static $appid='';

  private static $key='';

  //生成微信APP预支付信息

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

    $unified = array(

      'appid' => self::$appid,

      'attach' => '支付',

      'body' => $orderName,

      'mch_id' => self::$mchid,

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

      'notify_url' => $notifyUrl,

      'out_trade_no' => $outTradeNo,

      'spbill_create_ip' => '127.0.0.1',

      'total_fee' => intval($totalFee * 100),

      'trade_type' => 'APP',

    );

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

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

    $unifiedOrder = (array)simplexml_load_string($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']);

    }

    $arr = array(

      "appid" => self::$appid,

      'partnerid'=>self::$mchid,

      "timestamp" => $timestamp,

      "noncestr" => $unifiedOrder['nonce_str'],

      "package" => 'Sign=WXPay',

      "prepayid"=>$unifiedOrder['prepay_id'],

    );

    $data['paySign'] = self::getSign($arr);

    $data['appId']=self::$appid;

    $data['timeStamp']=$timestamp;

    $data['nonceStr']=$unifiedOrder['nonce_str'];

    $data['prepay_id']=$unifiedOrder['prepay_id'];

    $data['trade_type']=$unifiedOrder['trade_type'];

    $data['mchid']=self::$mchid;

    return $data;

  }

  //生成微信JSAPI预支付信息

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

    $unified = array(

      'appid' => self::$appid,

      'attach' => $orderName,

      'body' => $orderName,

      'mch_id' => self::$mchid,

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

      'notify_url' => $notifyUrl,

      'openid' => $openid,

      'out_trade_no' => $outTradeNo,

      'spbill_create_ip' => '127.0.0.1',

      'total_fee' => intval($totalFee * 100),

      'trade_type' => 'JSAPI',

    );

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

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

    }

    $arr = array(

      "appId" => self::$appid,

      "timeStamp" => $timestamp,

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

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

      "signType" => 'MD5',

    );

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

    return $arr;

  }

  //微信支付回调

  public static function actionNotify($postStr){

    $postObj = simplexml_load_string($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);

    }

    //验证签名

    $arr = (array)$postObj;

    unset($arr['sign']);

    if (self::getSign($arr,self::$key) != $postObj->sign) {

      die("签名错误");

    }

    //支付处理正确-判断是否已处理过支付状态

    //$orders = Order::find()->where(['uid'=>$postObj->openid, 'oid'=>$postObj->out_trade_no, 'status' => 0])->all();

    // if(count($orders) > 0){

    //   //更新订单状态

    //   foreach ($orders as $order) {

    //     //更新订单

    //     $order['status'] = 1;

    //     $order->update();

    //   }

    //   return '';

    // } else {

    //   //订单状态已更新，直接返回

    //   return '';

    // }

  }

  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 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/upload/otherpic43/';

    $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 = "";

    foreach ($arr as $key => $val){

      if (is_numeric($val)) {

        $xml .= "<" . $key . ">" . $val . "";

      } else {

        $xml .= "<" . $key . ">";

      }

    }

    $xml .= "";

    return $xml;

  }

  public static function getSign($params){

    ksort($params, SORT_STRING);

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

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

  }

}

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文章标题：tp5封装微信APP、JSAPI预支付信息-创新互联
文章路径：http://lszwz.com/article/dchcds.html