vk_app.php

<?php

namespace sborislav\vk_app;


class vk_user
{
    public $id;
    public $auth_key;

    public $group;
    public $type;
    public $install;
    public $hash;
    public $is_secure;

    public function create_user($get)
    {
        $this->id = (int)$get['viewer_id']; // id пользователя
        $this->group = (int)$get['group_id']; // id группы
        $this->auth_key =(string)$get['auth_key']; //подлинности сессии на сервере
        $this->type = (int)$get['viewer_type']; // 4 - admin , 3 - редактор, 2 модератор, 1 участник, 0 - никто
        $this->install = (int)$get['is_app_user']; // приожение установлено в группу = 1, нет = 0
        $this->hash = (string)$get['hash']; // данные после символа # в строке адреса
        $this->is_secure = (int)$get['is_secure']; // данные после символа # в строке адреса
    }

}

class vk_app extends vk_user
{
    private $_id_app;
    private $_secret_app;

    public $nameGroup;
    public $urlImg;
    public $cover_enabled;

    private $_isContinue = true;

    public function __construct($id = false, $secret_app =  false)
    {
        if ( $id && $secret_app)
        {
            $this->_id_app = $id;
            $this->_secret_app = $secret_app;
        }
        else
        {
           $this->_isContinue = false;
        }
    }

    public function isContinue()
    {
        return $this->_isContinue;
    }

    public function isInstall()
    {
        return $this->install;
    }

    public function isGroup()
    {
        return (bool)$this->group;
    }

    public function idGroup()
    {
        return $this->group;
    }

    public function apiGroup()
    {
        $request_params = array(
            'group_id' => $this->group,
            'fields' => 'cover',
            'v' => '5.63'
        );
        $get_params = http_build_query($request_params);
        $result = json_decode(file_get_contents('https://api.vk.com/method/groups.getById?'. $get_params));

        if ($result  && !isset( $result -> error ) )
        {
           $this->nameGroup =  $result -> response[0] -> name;
           $this->cover_enabled =  $result -> response[0] -> cover -> enabled;

           if ( $this->cover_enabled )
           {
               $this->urlImg =  $result -> response[0] -> cover -> images[2] -> url;
           }
           else
           {
               $this->urlImg =  $result -> response[0] -> photo_200;
           }
        }
        else
        {
            $this->_isContinue = false;
        }

    }

    public function hash($get)
    {
        if ( !isset($get['api_url']) )
        {
            $this->_isContinue = false;
        }
        else
        {
            $sign = "";
            foreach ($get as $key => $param)
            {
                if ($key == 'hash' || $key == 'sign' || $key == 'api_result') continue;
                $sign .=$param;
            }
            $x = false;

            if ( isset($get['sign']) ) hash_hmac('sha256', $sign, $this->_secret_app) == $get['sign'] ? $x = true : $x = false;

            if ($x) {
                $this->create_user($get);
                $this->apiGroup();
            }  else $this->_isContinue = false;



        }
    }

    public function check_session()
    {
        return ( $this->auth_key == md5($this->_id_app + '_' + $this->id + '_' + $this->_secret_app) );
    }

}


?>