    public static function extract ($var, $m) {

        foreach ($var as $k2 => $v2) {

            if ($k2 != '0') {

                $va[] = [$k2 => $m[$v2]];

            }elseif($k2 == ''){

                $va = ['default'];

            }else{

                $va = array($k2) ;

            }
        }

        return $va;

    }

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.