function __construct($options = null) {
        if ($options == null) $this->data = isset($_POST['options']) ? stripslashes_deep($_POST['options']) : null;
        else $this->data = $options;

        $this->action = isset($_REQUEST['act']) ? $_REQUEST['act'] : null;

        if (isset($_REQUEST['btn'])) $this->button_data = $_REQUEST['btn'];

        // Fields analysis
        $fields = isset($_REQUEST['fields']) ? $_REQUEST['fields'] : null;
        if (is_array($fields)) {
            foreach ($fields as $name=>$type) {
                if ($type == 'datetime') {
                    // Ex. The user insert 01/07/2012 14:30 and it set the time zone to +2. We cannot use the
                    // mktime, since it uses the time zone of the machine. We create the time as if we are on
                    // GMT 0 and then we subtract the GMT offset (the example date and time on GMT+2 happens
                    // "before").

                    $time = gmmktime($_REQUEST[$name . '_hour'], 0, 0,
                            $_REQUEST[$name . '_month'], $_REQUEST[$name . '_day'], $_REQUEST[$name . '_year']);
                    $time -= get_option('gmt_offset') * 3600;
                    $this->data[$name] = $time;
                }
            }
        }
    }