For Gonbe

AssistPlugin.php

<?php

namespace MinecrafterJPN;

use pocketmine\event\entity\EntityDamageByEntityEvent;
use pocketmine\event\Listener;
use pocketmine\event\player\PlayerDeathEvent;
use pocketmine\Player;
use pocketmine\plugin\PluginBase;
use pocketmine\command\Command;
use pocketmine\command\CommandSender;

class AssistPlugin extends PluginBase implements Listener
{
    private $damageSources;

    public function onLoad()
    {
    }

    public function onEnable()
    {
        $this->damageSources = [];
        $this->getServer()->getPluginManager()->registerEvents($this, $this);
    }

    public function onDisable()
    {
    }

    public function onCommand(CommandSender $sender, Command $command, $label, array $args)
    {
        return false;
    }

    public function onEntityDamageByEntity(EntityDamageByEntityEvent $event)
    {
        $player = $event->getEntity();
        $damager = $event->getDamager();
        $damage = $event->getDamage();
        if ($player instanceof Player and $damager instanceof Player) {
            if (isset($this->damageSources[$player->getName()][$damager->getName()])) {
                $this->damageSources[$player->getName()][$damager->getName()] += $damage;
            } else {
                $this->damageSources[$player->getName()][$damager->getName()] = $damage;
            }
        }

    }

    public function onPlayerDeath(PlayerDeathEvent $event)
    {
        $player = $event->getEntity();
        $cause = $player->getLastDamageCause();
        if ($cause instanceof EntityDamageByEntityEvent) {
            $killer = $cause->getDamager();
            if ($killer instanceof Player) {
                $damageSources = $this->damageSources[$player->getName()];
                $topDamager = "";
                $topDamage = 0;
                foreach ($damageSources as $damager => $damage) {
                    if ($damage > $topDamage) {
                        $topDamager = $damager;
                        $topDamage = $damage;
                    }
                }
                //経験値を $topDamager に付与する処理
            }
        }
    }
}