<?php
header(‘Content-type:text‘);
define("TOKEN", "weixin");
define("AppID", "wx0016e715caddff6f");
define("EncodingAESKey", "mKbYrK5PDc3tV8td9LqLVVU0hErwI2Bsq83ZRYqdp2S");
include_once "wxBizMsgCrypt.php";
$wechatObj = new wechatCallbackapiTest();
if (!isset($_GET[‘echostr‘])) {
    $wechatObj->responseMsg();
} else {
    $wechatObj->valid();
}

class wechatCallbackapiTest
{
    public function valid()
    {
        $echoStr = $_GET["echostr"];
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];
        $token = TOKEN;
        $tmpArr = array($token, $timestamp, $nonce);
        sort($tmpArr);
        $tmpStr = implode($tmpArr);
        $tmpStr = sha1($tmpStr);
        if ($tmpStr == $signature) {
            echo $echoStr;
            exit;
        }
    }


    public function responseMsg()
    {
        $timestamp  = $_GET[‘timestamp‘];
        $nonce = $_GET["nonce"];
        $msg_signature  = $_GET[‘msg_signature‘];
        $encrypt_type = "aes";

        $postStr = file_get_contents(‘php://input‘);

        if (!empty($postStr)) {

            //解密
            if ($encrypt_type == ‘aes‘){
                $pc = new WXBizMsgCrypt(TOKEN, EncodingAESKey, AppID);
//                $this->logger(" D \r\n".$postStr);
                $decryptMsg = "";  //解密后的明文
                $errCode = $pc->DecryptMsg($msg_signature, $timestamp, $nonce, $postStr, $decryptMsg);
             //   var_dump($errCode);exit;
                $postStr = $decryptMsg;
            }

            $postObj = simplexml_load_string($postStr, ‘SimpleXMLElement‘, LIBXML_NOCDATA);
            $RX_TYPE = trim($postObj->MsgType);

            switch ($RX_TYPE) {
                case "event":
                    $result = $this->receiveEvent($postObj);
                    break;
                case "text":
                    $result = $this->receiveText($postObj);
                    break;
            }
//            $this->logger("T " . $result);

            //加密
            if ($encrypt_type == ‘aes‘){
                $encryptMsg = ‘‘; //加密后的密文
                $errCode = $pc->encryptMsg($result, $timestamp, $nonce, $encryptMsg);
                $result = $encryptMsg;
//                $this->logger(" E \r\n".$result);
            }

            echo $result;
        } else {
            echo "";
            exit;
        }
    }

    private function receiveEvent($object)
    {
        $content = "";
        switch ($object->Event) {
            case "subscribe":
                $content = "关注了就好加油哦";
                break;
            case "unsubscribe":
                $content = "取消关注";
                break;
        }
        $result = $this->transmitText($object, $content);
        return $result;
    }

    //接收文本消息
    private function receiveText($object)
    {
        $keyword = trim($object->Content);
        $content = $object->ToUserName . "\n".$object->FromUserName. "\n".$object->Content. "\n".$object->MsgType;

        if (is_array($content)) {
            if (isset($content[0][‘PicUrl‘])) {
                $result = $this->transmitNews($object, $content);
            } else if (isset($content[‘MusicUrl‘])) {
                $result = $this->transmitMusic($object, $content);
            }
        } else {
            $result = $this->transmitText($object, $content);
        }

        return $result;
    }


    private function transmitText($object, $content)
    {
        $textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA[%s]]></Content>
</xml>";
        $result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content);
        return $result;
    }

    private function transmitNews($object, $arr_item)
    {
        if (!is_array($arr_item))
            return;

        $itemTpl = "<item>
        <Title><![CDATA[%s]]></Title>
        <Description><![CDATA[%s]]></Description>
        <PicUrl><![CDATA[%s]]></PicUrl>
        <Url><![CDATA[%s]]></Url>
    </item>
";
        $item_str = "";
        foreach ($arr_item as $item)
            $item_str .= sprintf($itemTpl, $item[‘Title‘], $item[‘Description‘], $item[‘PicUrl‘], $item[‘Url‘]);

        $newsTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[news]]></MsgType>
<Content><![CDATA[]]></Content>
<ArticleCount>%s</ArticleCount>
<Articles>
$item_str</Articles>
</xml>";

        $result = sprintf($newsTpl, $object->FromUserName, $object->ToUserName, time(), count($arr_item));
        return $result;
    }

    private function transmitMusic($object, $musicArray)
    {
        $itemTpl = "<Music>
    <Title><![CDATA[%s]]></Title>
    <Description><![CDATA[%s]]></Description>
    <MusicUrl><![CDATA[%s]]></MusicUrl>
    <HQMusicUrl><![CDATA[%s]]></HQMusicUrl>
</Music>";

        $item_str = sprintf($itemTpl, $musicArray[‘Title‘], $musicArray[‘Description‘], $musicArray[‘MusicUrl‘], $musicArray[‘HQMusicUrl‘]);

        $textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[music]]></MsgType>
$item_str
</xml>";

        $result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
        return $result;
    }

    private function logger($log_content)
    {
        if (isset($_SERVER[‘HTTP_APPNAME‘])) {   //SAE
            sae_set_display_errors(false);
            sae_debug($log_content);
            sae_set_display_errors(true);
        } else if ($_SERVER[‘REMOTE_ADDR‘] != "127.0.0.1") { //LOCAL
            $max_size = 10000;
            $log_filename = "log.xml";
            if (file_exists($log_filename) and (abs(filesize($log_filename)) > $max_size)) {
                unlink($log_filename);
            }
            file_put_contents($log_filename, date(‘H:i:s‘) . " " . $log_content . "\r\n", FILE_APPEND);
        }
    }
}


?>