Tools::getValue() not working as intended

[luky0]

Hi i'm trying to get a data from a form with Tools::getValue() but i've got no response.

if(Tools::isSubmit('action'))
        {
            // Registra nella sessione la posizione
            $act = Tools::getValue('action');

            $response['to'] = $act;

            $fld = ["gps_formatted","gps_locality",
            "gps_admin3","gps_admin2","gps_admin1",
            "gps_country","gps_postal_code","gps_dist","gps_step",
            "gps_lat","gps_lon","filtro_categotria"];
            if($act == "setsession" || $act == "blank") {
                $usr = [];    

                foreach($fld as $key) {
                    if($act == "blank") {
                        $usr[$key] = "";
                    } else {
                        $usr[$key] = Tools::getValue($key);
                    }
                }
                $response['done'] = $this->setUserLocation($usr);    
            } else if($act == "radius") {
                $response['setRadius'] = $this->setRadius(Tools::getValue('gps_dist'), Tools::getValue('gps_step'));    
                $response['radius'] = Tools::getValue('gps_dist');    
                $response['step'] = Tools::getValue('gps_step');    
            } else if($act == "categories") {
                $sql = 'SELECT c.*, cl.name, cl.description from ' 
                        . _DB_PREFIX_ . 'category c inner join ' 
                        ._DB_PREFIX_ . 'category_lang cl on c.id_category = cl.id_category  where c.is_location=1'
                        . ' and cl.id_lang =' . $this->context->cookie->id_lang;
                $response = Db::getInstance()->executeS($sql);
            } else if($act == "store") {                   
                Context::getContext()->cookie->__set("extra_value", Tools::getValue('data'));
                $response['ok'] = true;    
            } else if($act == "retrieve") {                
                $response['data'] = Context::getContext()->cookie->__get("extra_value");    
            } 
            $response["filtrocategoria"]=$this->setCategoria(Tools::getValue('filtro_categoria')); 
            // var_dump(Tools::getValue('filtro_categoria'));
            // $response["filtrocategoria"]=$this->setCategoria("546"); 
        }

as you see there are others getValue but the last won't work... what did i do wrong? ps i'm modifing another dev code and i cannot ask.

i've tried to set a data in the "hard way" and that works fine.

i'm currently working with PS 1.7.6.1 and unfortunally i cannot change.

Thank you for your patience!

[joseantgv]

Print all the data that you get:

var_dump($_GET);

Maybe this input is out of the submitted form or is a readonly input.

[luky0]

ok so i founded the error it seems that this module grabbed the data from an ajax call and in the call there wasn't the input, so i've setted it in...

Now finally works!

Thank you!