core/Session.php
public static function start () {
        if(!self::$started) {
            // Если содержи
            if(!empty($_COOKIE[self::$cookieName]) and !ctype_alnum($_COOKIE[self::$cookieName])) {
                unset($_COOKIE[self::$cookieName]);
            }
            session_set_cookie_params (self::$lifetime, '/');
            session_name (self::$cookieName);
            if(session_id() == '') {
                session_start();
            }
            self::$started = true;
        }
    }
public static function start () {
        if(!self::$started) {
            // Если содержи
            if(!empty($_COOKIE[self::$cookieName]) and !ctype_alnum($_COOKIE[self::$cookieName])) {
                unset($_COOKIE[self::$cookieName]);
            }
            session_set_cookie_params (self::$lifetime, '/');
            session_name (self::$cookieName);
            if(session_id() == '') {
                session_start();
            }
            self::$started = true;
        }
    }
Start session