Getting results of sliderUI

I made a plugin that use the command /steak and a slider will come up where they can choose how many steak they want to get(min:0 max:64)
but how do i get the results ?
im using formapi

PHP:

$plugin = $this->getServer()->getPluginManager();
        $formapi = $plugin->getPlugin("FormAPI");
        $form = $formapi->createCustomForm(function (Player $p, array $args){
            $steak = $args[0];
            if($steak == "0"){
                $p->getInventory()->addItem(Item::get(264, 0, 1));
                // i can do it till 64 but it'll be hard and will take long, any shortcuts?
            }
        });
        $form->setTitle();
        $form->addSlider();
        $form->sendToPlayer($p);

 

Just change $sender to $p

PHP:

                   $api = $this->getServer()->getPluginManager()->getPlugin("FormAPI");
                    if($api === null || $api->isDisabled()){
                        // CHECK THIS ?
                    }
                    $form = $api->createCustomForm(function (Player $sender, array $data){

                        $result = $data[0];
                        if($result != null){
                            $sender->getInventory()->addItem(Item::get(264, 0, $result));
                        }

                    });

                    $form->setTitle(TextFormat::BOLD . TextFormat::BLUE . "Want to order Diamond");
                    $form->addSlider("Amount" , 1, 64, 1);
                    $form->sendToPlayer($sender);

 

You can check out my github for more https://github.com/FreakingDev/PHC-CustomForm

 

Use DataPacketReceiveEvent & ModalFormResponsePacket. do not forget that the client is sending data to json. you can use

PHP:

json_decode($formData, true);