pocketmine\block\RedstoneWire::getHighestStrengthAround PHP Method

    public function getHighestStrengthAround()
    {
        $strength = 0;
        $hasChecked = [Vector3::SIDE_WEST => false, Vector3::SIDE_EAST => false, Vector3::SIDE_NORTH => false, Vector3::SIDE_SOUTH => false];
        //check blocks around
        foreach ($hasChecked as $side => $bool) {
            /** @var RedstoneSource $block */
            $block = $this->getSide($side);
            if ($block instanceof RedstoneSource) {
                if ($block->getStrength() > $strength and $block->isActivated($this)) {
                    $strength = $block->getStrength();
                }
                $hasChecked[$side] = true;
            }
        }
        //check blocks above
        $baseBlock = $this->add(0, 1, 0);
        foreach ($hasChecked as $side => $bool) {
            if (!$bool) {
                $block = $this->getLevel()->getBlock($baseBlock->getSide($side));
                if ($block->getId() == $this->id) {
                    if ($block->getStrength() > $strength) {
                        $strength = $block->getStrength();
                    }
                    $hasChecked[$side] = true;
                }
            }
        }
        //check blocks below
        $baseBlock = $this->add(0, -1, 0);
        foreach ($hasChecked as $side => $bool) {
            if (!$bool) {
                $block = $this->getLevel()->getBlock($baseBlock->getSide($side));
                if ($block->getId() == $this->id) {
                    if ($block->getStrength() > $strength) {
                        $strength = $block->getStrength();
                    }
                    $hasChecked[$side] = true;
                }
            }
        }
        unset($block);
        unset($hasChecked);
        return $strength;
    }