WorldNamesFixer.php

<?php

/**
 * @name WorldNamesFixer
 * @main TheNewHEROBRINE\WorldNamesFixer\Main
 * @version 1.0.0
 * @api 3.0.0-ALPHA7
 * @author TheNewHEROBRINE
 */

 namespace TheNewHEROBRINE\WorldNamesFixer {
 	class Main extends \pocketmine\plugin\PluginBase implements \pocketmine\event\Listener { 
		public function onEnable() {
			foreach (glob($this->getServer()->getDataPath(). "worlds/*") as $f) {
				$world = basename($f);
				if ($this->getServer()->isLevelLoaded($world)) continue;
				if (!$this->getServer()->isLevelGenerated($world)) continue;
				$this->getServer()->loadLevel($world);
			}
			foreach ($this->getServer()->getLevels() as $level) {
				echo PHP_EOL. $level->getName() . "->";
				$level->getProvider()->getLevelData()->LevelName = new \pocketmine\nbt\tag\StringTag("LevelName", $level->getFolderName());
				echo $level->getName();
			}
		}
	}
 }