Disable PvP on the whole server

In the sever.properties, you'l see there is a PVP option ;P

Code:

#Properties Config file
pvp=on

Turn it off.

OR if you want php,

PHP:

    public function onPlayerDamage(EntityDamageEvent $event){
        $event->setCancelled(true);
    }


 

when a function is in a class it's a method
the public private protected is a visibility keyword
non declared is implied as public but not recommended
see more on http://php.net/manual/en/language.oop5.visibility.php

private meaning only $this can access it
protected meaning only childrens can access it but not everyone
public meaning anyone can access it

private/protected is useful to store internal data that you dont want other class to mess with

also in PMMP only public functions can be registered to event handler