VKAPI + oAuth Support

<?php

/**
 * VKAPI class for vk.com social network
 *
 * @package server API methods (+oauth support)
 * @link http://vk.com/developers.php
 * @autor Oleg Illarionov (oauth support - Nikita A.)
 * @version 1.1
 */

class vkapi {
    var $api_secret;
    var $app_id;
    var $api_url;

    function vkapi($app_id, $api_secret, $oauth_token = '', $api_url = 'api.vk.com/api.php') {
        $this->app_id = $app_id;
        $this->token = $oauth_token;
        $this->api_secret = $api_secret;
        $this->oauth_url = "https://api.vk.com/";
        if (!strstr($api_url, 'http://')) $api_url = 'http://'.$api_url;
        $this->api_url = $api_url;
    }

    function api($method,$params=false,$oauth=false) {
        if($oauth==false){
            if (!$params) $params = array();
            $params['api_id'] = $this->app_id;
            $params['v'] = '3.0';
            $params['method'] = $method;
            $params['timestamp'] = time();
            $params['format'] = 'json';
            $params['random'] = rand(0,10000);
            ksort($params);
            $sig = '';
            foreach($params as $k=>$v) {
                $sig .= $k.'='.$v;
            }
            $sig .= $this->api_secret;
            $params['sig'] = md5($sig);
            $query = $this->api_url.'?'.$this->params($params);
            $res = file_get_contents($query);
            return json_decode($res, true);
        }else{
            $url="/method/".$method."?".$this->params($params)."&access_token=".$this->token;
            $res = $this->ssl($url);
            return json_decode($res, true);
        }
    }

    function token($code){
        $url = $this->ssl('/oauth/access_token?client_id='.$this->app_id.'&code='.$code.'&client_secret='.$this->api_secret);
        $data = json_decode($url, true);
        return $data;
    }

    function params($params) {
        $pice = array();
        foreach($params as $k=>$v) {
            $pice[] = $k.'='.urlencode($v);
        }
        return implode('&',$pice);
    }

    function ssl($req){
        $ch = curl_init($this->oauth_url.$req);
        curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_exec ($ch);
        return curl_multi_getcontent ($ch);
        curl_close ($ch);

    }
}
?>