Action on itemuse

How can I do when a Player uses a item like a slimeball that he gets a message [He should use the slimeball with right klick]

Handle PlayerInteractEvent. If action is PlayerInteractEvent::RIGHT_CLICK_BLOCK. If item ID matches Item::SLIMEBALL. Send message.

@PEMapModder thanks

if(PlayerInteractEvent::RIGHT_CLICK_BLOCK){
$event->getPlayer()->sendMessage("You are cool");
}
@PEMapModder like this?

No. How will PHP know what you are doing with PlayerInteractEvent::RIGHT_CLICK_BLOCK? Compare it with $PlayerInteractEvent->getAction(), to see if they are identical, using the === operator.

if(PlayerInteractEvent->getAction() == RIGHT_CLICK_BLOCK){
$event->getPlayer()->sendMessage("You are cool");
}
@@PEMapModder like this?

Do You Want A Cick in the air 1 sec look my plugin TNT
Do you want a click a block and do things
use PlayerInteractEvent

I know it... Since 2 h