PHP 操控微信公众号

<?php
class AutoAction extends CommonAction
{
    public function index()
    {
        $timestamp = $_GET['timestamp'];//timestamp其实就是一个时间戳
        $nonce = $_GET['nonce'];//nonce是一个随机参数
        $token = "ATA2zJ3969DD99SlJKYJhy22j96GKKlB";//这个token填写你在微信公众平台上写的那个值
        $signature = $_GET['signature'];//这个signature其实就是在微信公众平台已经加密好的字符串
        $echostr = $_GET['echostr'];
        $array = array($timestamp, $nonce, $token);
        sort($array);
        $tmpstr = implode('', $array);
        $tmpstr = sha1($tmpstr);
        if ($tmpstr == $signature && $echostr) {
            echo $echostr;
            exit;
        } else {
            $this->response_msg();
        }
    }

    private function response_msg()
    {
        $postArr = $GLOBALS['HTTP_RAW_POST_DATA'];
        $postObj = simplexml_load_string($postArr);
        if (strtolower($postObj->MsgType) == 'event') {
            //回复用户消息
            $toUser = $postObj->FromUserName;
            $fromUser = $postObj->ToUserName;
            //如果是关注事件(subscribe)
            if (strtolower($postObj->Event == 'subscribe')) {
                // 是否有推荐人
                $referrer = $postObj->EventKey;
                // 关注人openid
                $openid = $toUser->__toString();
                $referrer_str = $referrer->__toString();
                if ($referrer_str) {
                    $referrer_openid = explode('_',$referrer_str)[1];

                    // 判断关注人是否已关注别人
                    $wx_recommend = M('wx_recommend');
                    $exist = $wx_recommend->where(['new_openid'=>$openid])->find();
                    if (!$exist) { // 有效的用户
                        // 添加记录
                        $data = [
                            'openid' => $referrer_openid,
                            'new_openid'  => $openid,
                            'add_time'=> time(),
                        ];
                        $wx_recommend->add($data);
                    }

                }

                $arr = array(
                    array(
                        'title' => '标题',
                        'description' => "描述",
                        'picUrl' => 'xxx.jpg',
                        'url' => 'xxx.html',
                    ),
                );
                $this->_send_news($arr,$toUser,$fromUser);
            } elseif ($postObj->Event == 'CLICK') {
                //------------------- 点击事件 start ------------------------
                $event_key = $postObj->EventKey; // 获取key
                if($event_key=='V1001_PRESENT'){ 
                    $arr = array(
                        array(
                            'title' => '标题',
                            'description' => "描述",
                            'picUrl' => 'xxx.jpg',
                            'url' => 'xxx.html',
                        ),
                    );
                    $this->_send_news($arr,$toUser,$fromUser);
                }
                //------------------- 点击事件 end ------------------------
            }

        }
        //回复纯文本或单图文消息
        if (($postObj->MsgType) == 'text' && (trim($postObj->Content) == '我要帽子' || trim($postObj->Content) == '帽子')) {
            $toUser = $postObj->FromUserName;
            $fromUser = $postObj->ToUserName;

            $arr = array(
                array(
                    'title' => '标题',
                    'description' => "描述",
                    'picUrl' => 'xxx.jpg',
                    'url' => 'xxx.html',
                ),
            );
            $this->_send_news($arr,$toUser,$fromUser);

        } else if(($postObj->MsgType) == 'text' && (trim($postObj->Content) == '数量' || trim($postObj->Content) == '6')) {
            $fromUser = $postObj->ToUserName;//消息从哪里来
            $toUser = $postObj->FromUserName;//发送给谁
            // 用户openid
            $openid = $toUser->__toString();
            // 获取推荐数量
            $wx_recommend = M('wx_recommend');
            $count = $wx_recommend->where(['openid'=>$openid])->count();
            $content = "您当前已推荐关注人数为：".$count;
            $this->_send_text($content,$toUser,$fromUser);
        } else {
                $fromUser = $postObj->ToUserName;//消息从哪里来
                $toUser = $postObj->FromUserName;//发送给谁
                $content = "内容";
                $this->_send_text($content,$toUser,$fromUser);
        }
    }

    private function _send_text($content,$toUser,$fromUser) {
        $template = "<xml>
                                <ToUserName><![CDATA[%s]]></ToUserName>
                                <FromUserName><![CDATA[%s]]></FromUserName>
                                <CreateTime>%s</CreateTime>
                                <MsgType><![CDATA[%s]]></MsgType>
                                <Content><![CDATA[%s]]></Content>
                                </xml>";
        $time = time();
        $msgType = 'text';
        echo sprintf($template, $toUser, $fromUser, $time, $msgType, $content);
    }

    private function _send_news($arr,$toUser,$fromUser) {
        $template = "<xml>
						<ToUserName><![CDATA[%s]]></ToUserName>
						<FromUserName><![CDATA[%s]]></FromUserName>
						<CreateTime>%s</CreateTime>
						<MsgType><![CDATA[%s]]></MsgType>
						<ArticleCount>" . count($arr) . "</ArticleCount>
						<Articles>";
        foreach ($arr as $k => $v) {
            $template .= "<item>
							<Title><![CDATA[" . $v['title'] . "]]></Title> 
							<Description><![CDATA[" . $v['description'] . "]]></Description>
							<PicUrl><![CDATA[" . $v['picUrl'] . "]]></PicUrl>
							<Url><![CDATA[" . $v['url'] . "]]></Url>
							</item>";
        }
        $template .= "</Articles>
						</xml> ";

        $time = time();
        $msgType = "news";
        echo sprintf($template, $toUser, $fromUser, $time, $msgType);
    }

}