//获取accesstoken 的方法
public function index(){
    $appId = 'wxd0e50fe967dccccc';
    $appSecret = 'd7f6be12ce41b60ss0f45054';//虚拟的，不要用
    $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appId."&secret=".$appSecret;
    $ch = curl_init();//初始化curl
    curl_setopt($ch, CURLOPT_URL,$url); //要访问的地址
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);//跳过证书验证
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); // 从证书中检查SSL加密算法是否存在
    $data = json_decode(curl_exec($ch));
    if(curl_errno($ch)){
      var_dump(curl_error($ch)); //若错误打印错误信息
    }
    var_dump($data); //打印信息
     
    curl_close($ch);//关闭curl
  }

<?php
class TokenUtil {
    //获取access_token并保存到token.txt文件中
    public static function build_access_token(){
        $ch = curl_init(); //初始化一个CURL对象
        curl_setopt($ch, CURLOPT_URL, "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wx2e9f8435ebdb2856&secret=288db114f02b2b5cdc249ca75a4bf1cc");//设置你所需要抓取的URL
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//设置curl参数，要求结果是否输出到屏幕上，为true的时候是不返回到网页中,假设上面的0换成1的话，那么接下来的$data就需要echo一下。
        $data = json_decode(curl_exec($ch));
        if($data->access_token){
            $token_file = fopen("token.txt","w") or die("Unable to open file!");//打开token.txt文件，没有会新建
            fwrite($token_file,$data->access_token);//重写tken.txt全部内容
            fclose($token_file);//关闭文件流
        }else{
            echo $data->errmsg;
        }
        curl_close($ch);
    }
    
    //设置定时器，每两小时执行一次build_access_token()函数获取一次access_token
    public static function set_interval(){
        ignore_user_abort();//关闭浏览器仍然执行
        set_time_limit(0);//让程序一直执行下去
        $interval = 7200;//每隔一定时间运行
        do{
            build_access_token();
            sleep($interval);//等待时间，进行下一次操作。
        }while(true);
    }
    
    //读取token
    public static function read_token(){
        $token_file = fopen("token.txt", "r") or die("Unable to open file!");
        $rs = fgets($token_file);
        fclose($token_file);
        return $rs;
    }
}
?>

<?php
  //获取微信access_token
function getaccess_token(){
    $code = $_GET['code'];
    $appid = '自己的appid';
    $appsecret = '自己的appsecret';
    $url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid={$appid}&secret={$appsecret}&code={$code}&grant_type=authorization_code";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,$url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,0);
    $data = curl_exec($ch);
    curl_close($ch);
    echo $data;
}
getaccess_token();

<?php
$ACCESS_TOKEN = "替换你的ACCESS_TOKEN";//ACCESS_TOKEN
//openid数组
$touser = [
    'ouD7BuHpIKRXPIz7pdrwI9IwDRCU',
    'ouD7BuI36wSUZgteyiydmDrldQLU',
    'ouD7BuLejq7R4Vbuyh41bH778cg0'];
//模板消息请求URL
$url = "https://api.weixin.qq.com/cgi-bin/message/template/send?access_token=" . $ACCESS_TOKEN;

//遍历发送微信消息
foreach ($touser as $value) {
    $data = getDataArray($value);
    $json_data = json_encode($data);//转化成json数组让微信可以接收
    $res = https_request($url, urldecode($json_data));//请求开始
    $res = json_decode($res, true);
    if ($res['errcode'] == 0 && $res['errcode'] == "ok") {
        echo "发送成功！<br/>";
    }
}

//获取发送数据数组
function getDataArray($value)
{
    $data = array(
        'touser' => $value, //要发送给用户的openid
        'template_id' => "mfopDNUlvoBGGsPLB-d_nrfL8Je92xnTq5vk5ZBxL-w",//改成自己的模板id，在微信后台模板消息里查看
        'url' => "http://mp.weixin.qq.com/s/8UWPqHVa8PReWZp-No0ebA", //自己网站链接url
        'data' => array(
            'first' => array(
                'value' => "亲爱的同学，您有考试提醒，请查阅。",
                'color' => "#000"
            ),
            'keyword1' => array(
                'value' => "2017下半年教师资格证面试",
                'color' => "#f00"
            ),
            'keyword2' => array(
                'value' => "2018-1-6",
                'color' => "#173177"
            ),
            'keyword3' => array(
                'value' => "请看您的准考证",
                'color' => "#3d3d3d"
            ),
            'keyword4' => array(
                'value' => "教师资格证试讲",
                'color' => "#3d3d3d"
            ),
            'keyword5' => array(
                'value' => "答辩，选题，结构化",
                'color' => "#3d3d3d"
            ),
            'remark' => array(
                'value' => "\n现在是打印准考证时间，请您在考试前打印准考证，戳进来可以查看详情>>>",
                'color' => "#3d3d3d"
            ),
        )
    );
    return $data;
}


//curl请求函数，微信都是通过该函数请求
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;
}



?>