How to create a config with array()?

hey
i have the problem that i want to save an array() in the Config but it fails every time when i started it .
I have a resource folder with a config.yml and an other Config which spawns automatically ?Do you can help me in this Problem please ?

PHP:

<?php
/*
*
* 
*  _      _     _____  __   __  _____  _____   _____  __   __   ______  ______
* | |    | |(_)|__ __||  | |  ||  ___||     \ |__ __||  | |  | |  __  || _____|
* | |    | || |  | |  |  |_|  || |___ | (__) \  | |  |  | |  | | |__|_|| |____
* | |____| || |  | |  |   _   ||  ___||      |  | |  |  | |  | |  __  ||  ____|   
* |   __   || |  | |  |  | |  || |___ |  | \ |  | |  |  |_|  | | |__| || |____
* |__/  \__||_|  |_|  |__| |_ ||_____||__| \_|  |_|  |_______| |______||______|
* This plugin was made by WitherTube :D.
* It was published on PocketMine-Forum , GitHub or Twitter ^^.
* For upcoming News follow me on Twitter and maybe subscribe my channel :D.
*
*
* @author WitherTube
* @link Twitter : https://twitter.com/WitherDevPE
* @link YouTube : https://www.youtube.com/channel/UCBcXzwKx27T1OEXCU9_NZiQ
* @link Pocketmine : https://forums.pocketmine.net/members/withertube.40392/
* @link GitHub : it is disable :(
*
*/
namespace Withertube ;

use pocketmine\plugin\PluginBase;
use pocketmine\event\Listener;
use pocketmine\event\player\PlayerChatEvent;
use pocketmine\utils\Config;

class ChatSafe extends PluginBase implements Listener {
    public $cfg;
    public $badwords = array();

public function onEnable(){
$this->getLogger()->info("wurde aktiviert");
if (!is_dir($this->getDataFolder())) {
            mkdir($this->getDataFolder());
        }
        $config = new Config($this->getDataFolder() . "config.yml", Config::YAML, ["badwords" => array(
     " bastard " ,
     " flugzeuge " ,
    
)]);
$this->reloadConfig();
$this->config = $this->getConfig()->getAll();
$this->getServer()->getPluginManager()->registerEvents($this, $this);
}



public function onChat(PlayerChatEvent $event)
{

$msg = $event->getMessage();
$badwords = $this->getConfig()->get("badwords");
$neuersatz = str_ireplace($badwords,"****",$msg);
$event->setMessage($neuersatz);
}

public function onDisable(){
$this->getLogger()->info("wurde deaktiviert");
}

       
   
   
   

}
//That is the main.php


#################################
###### Plugin made by WitherTube
#################################

badwords:
    - bastard
    - flugzeuge

//This is the Config.yml


Are You Forgot foreach !!
Must be use Foreach($badwords as $b){

}

str_ireplace accepts arrays. Learn PHP.

Please specify the problem. What is "it fails"?

Tons of solutions exist for the same question, just search: https://www.google.com/search?q=How to create a config with array() site:pocketmine.net