/**
* set_enabled
* Changes the value of enabled
* @param bool|null $value
*/
public static function set_enabled($value = null)
{
if (is_null($value)) {
self::$enabled = self::$enabled ? false : true;
} else {
self::$enabled = make_bool($value);
}
$_SESSION['art_enabled'] = self::$enabled;
//setcookie('art_enabled', self::$enabled, time() + 31536000, "/");
}