http://api100.duapp.com/almanac/?appkey=trialuser

"公历2014年1月13日(农历2013年12月13日)\n星期一\n岁次：癸巳年、生肖属蛇、乙丑月、甲申日\n宜：祭祀 安香 酬神 上表章 词讼 袭爵受封 出行 上官赴任 临政亲民 移徙 沐浴 理发 整手足甲 裁衣 起基 竖柱上梁 修仓库 经络 酝酿 开市 挂匾 纳财 扫舍宇 伐木 畋猎 栽种 牧养 纳畜 破土 修坟 立碑 安葬\n忌：祈福 求嗣 会亲友 订婚 纳采问名 安床 安门 解除 治病 探病 立券 交易 开仓库 出货财\n冲：冲虎(寅申相冲)"

<?php
/*
    方倍工作室
    CopyRight 2013 All Rights Reserved
*/

define("TOKEN", "weixin");

$wechatObj = new wechatCallbackapiTest();
if (!isset($_GET['echostr'])) {
    $wechatObj->responseMsg();
}else{
    $wechatObj->valid();
}

class wechatCallbackapiTest
{
    public function valid()
    {
        $echoStr = $_GET["echostr"];
        if($this->checkSignature()){
            echo $echoStr;
            exit;
        }
    }

    private function checkSignature()
    {
        $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){
            return true;
        }else{
            return false;
        }
    }

    public function responseMsg()
    {
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
        if (!empty($postStr)){
            $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
            $RX_TYPE = trim($postObj->MsgType);

            switch ($RX_TYPE)
            {
                case "text":
                    $resultStr = $this->receiveText($postObj);
                    break;
                case "event":
                    $resultStr = $this->receiveEvent($postObj);
                    break;
                default:
                    $resultStr = "";
                    break;
            }
            echo $resultStr;
        }else {
            echo "";
            exit;
        }
    }

    private function receiveText($object)
    {
        $keyword = trim($object->Content);
        $url = "http://api100.duapp.com/almanac/?appkey=trialuser";
        $output = file_get_contents($url);
        $contentStr = json_decode($output, true);
        
        $resultStr = $this->transmitText($object, $contentStr);
        return $resultStr;
    }

    private function receiveEvent($object)
    {
        $contentStr = "";
        switch ($object->Event)
        {
            case "subscribe":
                $contentStr = "欢迎关注方倍工作室";
                break;
            default:
                break;
        }
        $resultStr = $this->transmitText($object, $contentStr);
        return $resultStr;
    }
    
    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>";
        $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content);
        return $resultStr;
    }

}
?>