<?php
const API = '5.92'; //версия апи
const TOKEN = ''; //токен
const KEY = ''; //ключ каллбэка


    $data = json_decode(file_get_contents("php://input"));

    switch ($data->type){
        case 'confirmation':
            echo KEY;
            break;
        case 'message_new':
            $data = $data->object;
            $user_id = $data->from_id;
            $peer_id = $data->peer_id;
            $message = $data->text;
            switch ($message){
                case '/debug':
                    MsgSend("[Debug]\npeer_id=".$peer_id."\n[".date('H:i:s')." || ".date('Y-m-d')."]", $peer_id);
                    echo 'ok';
                    break;
            }
            break;
        default:
            echo 'ok';
            exit;
}
function call($method, $params = [])
    {
      $methods = 'https://api.vk.com/method/';
      $params['access_token'] = TOKEN;
      $params['v'] = API;
      $url = $methods . $method . '?' . http_build_query($params);
      $curl = curl_init($url);
      curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
      $json = curl_exec($curl);
      curl_close($curl);
      $response = json_decode($json, true);
     return $response['response'];
    }

function MsgSend($message, $peer_id, $attachments = [])
    {
       return call('messages.send', [
         'random_id' => rand(),
         'peer_id' => $peer_id,
         'message' => $message,
         'payload' => 1000,
         'attachment' => implode(',', $attachments)
     ]);
    }
?>