Help plz promise I trust u can fix it:}

I am making plugin named sbmenu on gui and I am using invmenu.
Btw I need to add functions like command open another menu bye changing a slot item if u r able to help me PLSS give an example so I can learn fast.
Thanks in advance
Code is

PHP:

    public function sbmenu($sender)
    {
        $this->menu->readonly();
         $this->menu->setName("§rSkyBlock Menu");
        $inventory = $this->menu->getInventory();
                $inventory->setContents(array_fill(0, 54, ItemFactory::get(ItemIds::IRON_BARS)->setCustomName(TextFormat::ITALIC)));
                $inventory->setItem(13, ItemFactory::get(ItemIds::SKULL, 3)->setCustomName("§r§eYour profile \n§a⚔Damage §d\n§a❤Health §d" . $sender->getHealth() . "\n♆§aStrenght 10 \n✦§aSpeed 100 \n§a❇Crit Chance §d0\n§a✴Crit Damage  §d0.5\n§a✔Pet Luck §d10\n§a✎Intelligence §d1000IQ\n♱§aMagic Find §d19\n❉§aSea Creature chance 24%"));
                $inventory->setItem(19, ItemFactory::get(ItemIds::DIAMOND_SWORD)->setCustomName("§r§aSkills\n§eYou can check your skills in specific Category!"));
                $inventory->setItem(20, ItemFactory::get(ItemIds::PAINTING)->setCustomName("§r§cCollections\n§aYou ccan check your collections in specific categories!"));
                $inventory->setItem(21, ItemFactory::get(ItemIds::BOOK)->setCustomName("§r§aRecipe book")->setLore("§r§eClick to see unlocked recipes!"));
                $inventory->setItem(22, ItemFactory::get(ItemIds::EMERALD)->setCustomName("§r§aTrade§c§4COMING SOON§c)§r"));
                $inventory->setItem(23, ItemFactory::get(ItemIds::BOOK)->setCustomItem("§r§gMail log"));
               
$inventory->setItem(24, ItemFactory::get(ItemIds::BOOK)->setCustomItem("§r§bQuest Log!\n Tap to open quest logs!"));

$inventory->setItem(25, ItemFactory::get(ItemIds::CLOCK)->setCustomItem("§r§aEVENTS!"));

$inventory->setItem(26, ItemFactory::get(ItemIds::ENDER_CHEST)->setCustomItem("§r§gEnder Chest!\n Tap to open ender storage!"));

$inventory->setItem(31, ItemFactory::get(ItemIds::CRAFTING_TABLE)->setCustomItem("§r§gCRAFTING TABLE!\n Tap to open custom crafting gui!"));
                 
        $this->menu->send($sender);
             
                }
                $player = $sender->getName();
$player, Item $itemClicked, Item $itemClickedWith, SlotChangeAction $action): bool {
                    switch ($action->getSlot()) {
                        case 31:
          $this->getServer()->dispatchCommand($sender, "invcraft");
                    }
            }

 

@Primus

 

1. Create "custom items"

2. Give them custom items

3. Listen on event (PlayerInteractEvent, PlayerItemHeldEvent)

4. Open the InvMenu

Something helpful: https://forums.pmmp.io/threads/hotbar-menu.4004/