Change something in a Config

Hello Pocketmine-Developer,
I need to know how can i change somethink in a Config if the "somethink" already exist?

$config->set($config->get("Rang: ", "Owner");
^^
Do not work.

 

Any error

 

Try $config->set("Rank", "Owner");

 

Nah, this can't work bc it set a new value into the Config.

 

Nah

 

Isnt That what you want

 

Did you try it? As far as i know it updates the key value

 

PHP:

$arr = $config->getAll();
if(isset($arr["your_index"])){
    $arr["your_index"] = "New Value";
}
$config->setAll($arr);