Very simple plugin that kicks player when they touch doors. Doors still open though. This was done on request.

DoorKick.php

<?php
 
/*
__PocketMine Plugin__
name=DoorKick
description=Get's kicked if touches door
version=1.0
author=99leonchang
class=DoorKick
apiversion=9,10,11
*/
 
class DoorKick implements Plugin{
 
  private $api;
	public function __construct(ServerAPI $api, $server = false){
		$this->api = $api;
	}
	
	public function init(){
		$this->api->addHandler("player.interact", array($this, "touchHandler"), 100);
		$this->api->addHandler("player.block.touch", array($this, "eventHandler"), 100);
 
	}
 
	public function touchHandler($data, $event) {
		$dataTarget = $data["target"];
		if ($dataTarget->getID() === WOOD_DOOR_BLOCK) {
				// $data->close("NO TOUCHING THE DOORS", false);
				$player->close("Don't touch the door!");
				return false;
			}
		case "player.block.touch":
			if($dataTarget->getID() === WOOD_DOOR_BLOCK)
			{
				$player->close("Don't touch the door!");
				return false;
			}
	}
	
	public function __destruct(){
 
	}
}