Please check this code

PHP:

    public function onEDBEE(EntityDamageEvent $ev){
        if($ev instanceof EntityDamageByEntityEvent){
            $damager = $ev->getDamager();
            $entity = $ev->getEntity();
            if($damager instanceof Player){
                if($enitity instanceof SLIME){
                    $ev->setDamage(0);
                    $ev->setKnockBack(10);
                }
            }
        }
    }

My Idea is using Slime entity as a ball for football with resourcepack and plugin
I want to when a player attacked Slime, Slime knockback to 10 block farther and don't took any damage from attack
When I started the server, There wasn't any error but in many years I program in C++ I know when my code ran for first time and I don't have any error there is a problem
However, I'm amateur in PMMP API please check my code and post my problem in this thread
and sorry for my incorrect English grammer if there is a problem in my text grammer

 

There is no grammatical mistake in the presented code.

 

instanceof doesn't give errors when a class does not exist. So, for example:

PHP:

/** @var Player $player */
return ($player instanceof AClassThatDoesNotExist);//AClassThatDoesNotExist is a class that does not exist


will return false and no errors. Did you name your slime class SLIME and not Slime? And did you import the Player class? There's a typo in $entity vs $enitity. You probably didn't import the Player class so the code isn't being executed beyond.