微信公众号之主动给用户发送消息功能

//先添加客服
function addkf()
{
 $token = getToken();
 $url = 'https://api.weixin.qq.com/customservice/kfaccount/add?access_token='.$token;
 $data = '{
   "kf_account" : "system@system",
   "nickname" : "客服1",
   "password" : "admin",
 }';
 echo https_request($url,$data);
}

//获取access_token的方法。
function getToken()
{
 $appid = 'appid';
 $appsecret = 'appsecret';
 $token_file = dirname(dirname(__FILE__)).'/data/token.txt';
 if(!file_exists($token_file) || ((time() - filemtime($token_file))   7000)){
  $TOKEN_URL="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$appsecret;
  $json=file_get_contents($TOKEN_URL);
  $result=json_decode($json);
  $ACC_TOKEN=$result- access_token;
  file_put_contents($token_file,$ACC_TOKEN);
 }else{
  $ACC_TOKEN = file_get_contents($token_file);
 }
 return $ACC_TOKEN;
}
//调用发送方法
function sendmsg($content,$openid)
{
 $token = getToken();
 $url = 'https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token='.$token;
 $content = '感谢你的关注\n回复你厉害 \n例如<a href=\"http://www.baidu.com\" 回复123456</a ';
 $data = '{
  "touser":"'.$openid.'",
  "msgtype":"text",
  "text":
  {
    "content":"'.$content.'"
  }
 }';
 https_request($url,$data);
 return true;
}
/**
 * request 请求
 */
function https_request($url, $data = null){
 $curl = curl_init();
 curl_setopt($curl, CURLOPT_URL, $url);
 curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
 curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
 if (!empty($data)){
  curl_setopt($curl, CURLOPT_POST, 1);
  curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
 }
 curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
 $output = curl_exec($curl);
 curl_close($curl);
 return $output;
}