//获取access_token
function getWechatAccessToken(){
 $wechatInfo = M('wechat_info')->select();
 $wechatInfo = array_reduce($wechatInfo, create_function('$result, $v', '$result[$v["conf_name"]] = $v;return $result;'));
 $expireTime = $wechatInfo['PUBLIC_WECHAT_ACCESSTOKEN_EXPIRES']['conf_value'];        //前面不用管，是我数据库相应设置

 if (time() < $expireTime){    //access_token未过期
  return $wechatInfo['PUBLIC_WECHAT_ACCESSTOKEN']['conf_value'];
 }else{         //access_token过期，重新获取
  $baseUrl = C('WECHAT_PUBLIC_GET_ACCESS_TOKEN');
  $url = str_replace("##APPSECRET##", $wechatInfo['PUBLIC_WECHAT_APPSECRET']['conf_value'], str_replace("##APPID##", $wechatInfo['PUBLIC_WECHAT_APPID']['conf_value'], $baseUrl));
  $result = file_get_contents($url);
  $result = json_decode($result, true);

  if (array_key_exists('errorcode', $result)){  //失败重试一次
   return false;
  }else{
   M('wechat_info')->where(array('conf_name' => 'PUBLIC_WECHAT_ACCESSTOKEN'))->save(array('conf_value' => $result['access_token']));
   M('wechat_info')->where(array('conf_name' => 'PUBLIC_WECHAT_ACCESSTOKEN_EXPIRES'))->save(array('conf_value' => time()+$result['expires_in']-200));
   return $result['access_token'];
  }
 }
}

//创建临时二维码
function getTemporaryQrcode($orderId){
 $accessToken = getWechatAccessToken();
 $url = str_replace("##TOKEN##", $accessToken, C('WECHAT_PUBLIC_GET_TEMPORARY_TICKET'));
 $qrcode = '{"expire_seconds": 1800, "action_name": "QR_SCENE", "action_info": {"scene": {"scene_id": '.$orderId.'}}}';
 $result = api_notice_increment($url, $qrcode);
 $result = json_decode($result, true);
 return urldecode($result['url']);
}

function api_notice_increment($url, $data){
 $ch = curl_init();
 $header = "Accept-Charset: utf-8";
 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
 curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
 curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
 curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)');
 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
 curl_setopt($ch, CURLOPT_AUTOREFERER, 1);
 curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 $tmpInfo = curl_exec($ch);
 if (curl_errno($ch)) {
  curl_close( $ch );
  return $ch;
 }else{
  curl_close( $ch );
  return $tmpInfo;
 }

}

<xml><ToUserName><![CDATA[toUser]]></ToUserName>　　　　　　　　//开发者微信号
<FromUserName><![CDATA[FromUser]]></FromUserName>　　　　　　　//发送者账号（openid）
<CreateTime>123456789</CreateTime>　　　　　　　　　　　　　　　　//消息创建时间（整型）
<MsgType><![CDATA[event]]></MsgType>　　　　　　　　　　　　　　//消息类型 event
<Event><![CDATA[subscribe]]></Event>　　　　　　　　　　　　　　//事件类型（subscribe）
<EventKey><![CDATA[qrscene_123123]]></EventKey>　　　　　　　　//事件KEY值，qrscene_为前缀，后面为二维码参数值
<Ticket><![CDATA[TICKET]]></Ticket>　　　　　　　　　　　　　　　//二维码ticke值，可以用来换取二维码图片
</xml> 

<xml>
<ToUserName><![CDATA[toUser]]></ToUserName>　　　　　　　　//开发者微信号
<FromUserName><![CDATA[FromUser]]></FromUserName>　　　　 //发送者账号（openid）
<CreateTime>123456789</CreateTime>　　　　　　　　　　　　　//消息创建时间
<MsgType><![CDATA[event]]></MsgType>     //消息类型event
<Event><![CDATA[SCAN]]></Event>　　　　　　　　　　　　　　 //事件类型 event
<EventKey><![CDATA[SCENE_VALUE]]></EventKey>   //事件key值，是一个32位无符号整数，即创建二维码时的二维码scene_id
<Ticket><![CDATA[TICKET]]></Ticket>      //二维码的ticke，可以用来换取二维码图片
</xml>

public function urlRedirect(){
  $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
  $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
  $fromUsername = (string)$postObj->FromUserName;
  $EventKey = trim((string)$postObj->EventKey);
  $keyArray = explode("_", $EventKey);
  if (count($keyArray) == 1){   //已关注者扫描
   $this->sendMessage($fromUsername, $EventKey);
  }else{　　　　　　　　　　　　　　　　　　　//未关注者关注后推送事件
   $this->sendMessage($fromUsername, $keyArray[1]);
  }
 }

//给用户发送图文消息，点击跳转到报价页面
 public function sendMessage($openid,$orderId){
  $url = str_replace('##TOKEN##', getWechatAccessToken(), C('WECHAT_SEND_MESSAGE'));
  $redirectUrl = str_replace("##ORDERID##", $orderId, str_replace("##OPENID##", $openid, C('WECHAT_REDIRECT_URL_PRE')));
  $orderInfo = M('order')->where(array('orderid' => $orderId))->field(array('totalMoney', 'savedMoney', 'roomarea'))->find();
  $description = str_replace("##ROOMAREA##", intval($orderInfo['roomarea'] * 1.25), C('WECHAT_MESSAGE_BRIEF'));
  $description = str_replace("##TOTALBUDGET##", $orderInfo['totalMoney'], $description);
  $description = str_replace("##MARKETBUDGET##", $orderInfo['totalMoney']+$orderInfo['savedMoney'], $description);
  $description = str_replace("##SAVEMONEY##", $orderInfo['savedMoney'], $description);
  $dataStr = '{"touser":"' . $openid . '","msgtype":"news","news":{"articles":[{"title":"' . C('WECHAT_MESSAGE_TITLE') .
   '","description":"' . $description . '","url":"' . $redirectUrl . '","picurl":"' . C('WECHAT_MESSAGE_PICURL') . '""}]}}';
  api_notice_increment($url, $dataStr);
 }

{
 "touser":"OPENID",
 "msgtype":"news",
 "news":{
  "articles": [
   {
    "title":"Happy Day",
    "description":"Is Really A Happy Day",
    "url":"URL",
    "picurl":"PIC_URL"
   },
   {
    "title":"Happy Day",
    "description":"Is Really A Happy Day",
    "url":"URL",
    "picurl":"PIC_URL"
   }
   ]
 }
}