Block detection by explosion

Well im trying to help him and what i mean is only replace certain blocks with air and keep some of them. For example prevent grass from destroying but obsidian.

 

PHP:

public function onExplode(EntityExplodeEvent $e) {
      foreach($e->getBlockList() as $b){
         if(var_dump($e->getBlockList()) == Block::get(Block::OBSIDIAN)){
              $x = $b->getX();
              $y = $b->getY();
              $z = $b->getZ();
              $this->getLevel()->setBlock(new Vector3($x, $y, $z), Block::get(Block::AIR));
            }
        }
    }

Can it work?
Thanks
PS: If you think that I'm a noob, help me instead of criticizing what I'm doing, it was just just to be frank

 

This was the code I used to destroy a obsidian with a tnt https://github.com/PrimusLV/FactionsPE/blob/reborn/src/factions/engine/ExploitEngine.php#L63-L81

 

Because I want to check the name, not other things. And your console will lag when you dump all blocks.

 

The obsidian block is not in the list, because it's not destroyed.

 

If you just want it to explode obsidian as well, you could set the force superhigh so it explodes every block (except bedrock then) around it.

 

PHP:

public function onExplode(EntityExplodeEvent $e) {
        $blocks = $e->getBlockList();
        foreach($blocks as $num => $block){
            if($block instanceof Obsidian) { //Remember to use pocketmine\block\Obsidian;
               unset($blocks[$num]);
            }
         }
          $e->setBlockList($blocks);
    }


This removes all obsidian blocks out of the blockList.

 

get_class() returns the class name, not all its properties.