Get dropped item event

What event using when player gets dropped item?

pocketmine\event\inventory\InventoryPickupItemEvent

Use common sense. It's pocketmine\event\inventory\InventoryPickupItemEvent.

T

Thanks.

Except that common sense is often wrong (like your anti water spreading plugin), so it is perfectly fine to ask.
BTW, you are abusing bolds a bit.

Thank you. And what internal function for this event?

read the docs/source code yourself. https://github.com/PocketMine/Pocke.../event/inventory/InventoryPickupItemEvent.php

read the docs/source code yourself. https://github.com/PocketMine/Pocke.../event/inventory/InventoryPickupItemEvent.php