                    self::ajax($v);
                } else {
                    if (in_array($k, $arr)) {
                        // echo $k;
                        self::incFront($k, $var);
                    } else {
                        self::error('404');
                    }
                }
            }
        }
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.