    public static function error ($vars="", $val='') {
        if( isset($vars) && $vars != "" ) {
            include(GX_PATH.'/inc/lib/Control/Error/'.$vars.'.control.php');
        }else{
            include(GX_PATH.'/inc/lib/Control/Error/unknown.control.php');
        }
    }
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.