APF_Demo_PageMetaBox__Advanced::validate PHP Метод

Alternatively you can use validation_{class name}() predefined callback method.

public validate ( $aInputs, $aOldInputs, $oAdminPage )

    public function validate($aInputs, $aOldInputs, $oAdminPage)
    {
        return $aInputs;
    }

APF_Demo_PageMetaBox__Advanced