/**
     * Get current proxy
     */
    public static function getProxy()
    {
        $current_proxy_line = file_get_contents(__DIR__ . '/../config/current_proxy_line.txt');

        $lines = file(__DIR__ . '/../config/proxy_list.txt', FILE_IGNORE_NEW_LINES);

        $proxy = $lines[$current_proxy_line];

        if (empty($proxy)) {
            $current_proxy_line = 0;
            $proxy = $lines[$current_proxy_line];
        }else{
            $current_proxy_line++;
        }
        file_put_contents(__DIR__ . '/../config/current_proxy_line.txt', $current_proxy_line);

        return $proxy;
    }