pocketmine\entity\Zombie::getNearestPlayer PHP Method

    private function getNearestPlayer()
    {
        $dis = PHP_INT_MAX;
        $player = false;
        foreach ($this->getViewers() as $p) {
            if ($p->distance($this) < $dis) {
                $dis = $p->distance($this);
                $player = $p;
            }
        }
        return $dis <= $this->hate_r ? $p : false;
    }