/**
* @desc 获取access_token
* @return String access_token
*/
function getAccessToken(){
  $AppId = '1232assad13213123';
  $AppSecret = '2312312321adss3123213';
  $getUrl = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid='.$AppId.'&secret='.$AppSecret;
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $getUrl);
  curl_setopt($ch, CURLOPT_HEADER, 0);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURL_SSLVERSION_SSL, 2);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
  $data = curl_exec($ch);
  $response = json_decode($data);
  return $response->access_token;
}

/**
* @desc 实现天气内容回复
*/
public function testWeixin(){
$access_token = $this->getAccessToken();
$customMessageSendUrl = 'https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token='.$access_token;
$description = '今天天气的详细信息（从第三方获取）。';
$url = 'http://weather.com/';
$picurl = 'http://weather.com/';
$postDataArr = array(
'touser'=>'OPENID',
'msgtype'=>'news',
'news'=>array(
  'articles'=>array(
 'title'=>'当天天气',
 'description'=>$description,
 'url'=>$url,
 'picurl'=>$picurl,
  ),
),
);
$postJosnData = json_encode($postDataArr);
$ch = curl_init($customMessageSendUrl);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postJosnData);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
$data = curl_exec($ch);
var_dump($data);
}