How can I add cape to player?

Is there something like addCape()?

 

Not that I would know. You can add a cape that everyones sees with some things (IOBit and a Cape)

 

I tried this way :

PHP:

$path = $this->getDataFolder() . "cape_youtube.png";
                   $oldSkin = $player->getSkin();
                   $capeData = @imagecreatefrompng($path);
                   $skin = new Skin($oldSkin->getSkinId(), $oldSkin->getSkinData(), $capeData, $oldSkin->getGeometryName(), $oldSkin->getGeometryData());
                   $player->setSkin($skin);
                   $player->sendSkin();

But I think it is for old api , it still shows me error