How to get player's name in a configuration file?

Hello guys , I need help for a plugin for my private server . How do I take the nick of a new player and transfer it in a config file ?

Spoiler: Example

-Steve Joined the game .
> Plugins save the nick Steve in the config file ;
#Other Configuration #
Steve : true
-Steve Left the game
-Player Joined the game
> Plugin save the nick Player in the config file ;
#Other Configuration #
Steve : true
Player : true

Thanks a lot!

You will need to call the code below when player joins.

Code:

$player = $event->getPlayer(); #gets the player -> $player
        $c = $this->getResource("config.yml");
        $o = stream_get_contents($c);
        fclose($c);
        file_put_contents($this->getDataFolder() . "config.yml", $player); #puts the $player into config file.    

I don't have the chance to test the code, but I think it will work as long as you call it under JoinEvent.

It will override the file every time.

I changed it. Does it work now?

PHP:

if(!$this->players->exists($event->getPlayer()->getName()){
$this->players->set($event->getPlayer()->getName());
}

Not the best way, but it is a start. Also, try reading the docs: docs.pocketmine.net

http://Jenkins.PocketMine.net/job/PocketMine-MP-Doc/doxygen is more accurate.