pocketmine\level\generator\populator\Cactus::canCactusStay PHP Метод

    private function canCactusStay($x, $y, $z)
    {
        $b = $this->level->getBlockIdAt($x, $y, $z);
        $below = $this->level->getBlockIdAt($x, $y - 1, $z);
        foreach (array($this->level->getBlockIdAt($x + 1, $y, $z), $this->level->getBlockIdAt($x - 1, $y, $z), $this->level->getBlockIdAt($x, $y, $z + 1), $this->level->getBlockIdAt($x, $y, $z - 1)) as $adjacent) {
            if ($adjacent !== Block::AIR) {
                return false;
            }
        }
        return $b === Block::AIR and ($below === Block::SAND or $below === Block::CACTUS);
    }