diff --git a/src/pocketmine/Server.php b/src/pocketmine/Server.php
index 813d80aad..ec3d4df85 100644
--- a/src/pocketmine/Server.php
+++ b/src/pocketmine/Server.php
@@ -693,29 +693,32 @@ class Server{
 		return $result;
 	}
 
+	private function getPlayerDataPath(string $username) : string{
+		return $this->getDataPath() . '/players/' . strtolower($username) . '.dat';
+	}
+
 	/**
 	 * Returns whether the server has stored any saved data for this player.
 	 */
 	public function hasOfflinePlayerData(string $name) : bool{
-		$name = strtolower($name);
-		return file_exists($this->getDataPath() . "players/$name.dat");
+		return file_exists($this->getPlayerDataPath($name));
 	}
 
 	public function getOfflinePlayerData(string $name) : CompoundTag{
 		$name = strtolower($name);
-		$path = $this->getDataPath() . "players/";
+		$path = $this->getPlayerDataPath($name);
 		if($this->shouldSavePlayerData()){
-			if(file_exists($path . "$name.dat")){
+			if(file_exists($path)){
 				try{
 					$nbt = new BigEndianNBTStream();
-					$compound = $nbt->readCompressed(file_get_contents($path . "$name.dat"));
+					$compound = $nbt->readCompressed(file_get_contents($path));
 					if(!($compound instanceof CompoundTag)){
 						throw new \RuntimeException("Invalid data found in \"$name.dat\", expected " . CompoundTag::class . ", got " . (is_object($compound) ? get_class($compound) : gettype($compound)));
 					}
 
 					return $compound;
 				}catch(\Throwable $e){ //zlib decode error / corrupt data
-					rename($path . "$name.dat", $path . "$name.dat.bak");
+					rename($path, $path . '.bak');
 					$this->logger->notice($this->getLanguage()->translateString("pocketmine.data.playerCorrupted", [$name]));
 				}
 			}else{
@@ -776,7 +779,7 @@ class Server{
 		if(!$ev->isCancelled()){
 			$nbt = new BigEndianNBTStream();
 			try{
-				file_put_contents($this->getDataPath() . "players/" . strtolower($name) . ".dat", $nbt->writeCompressed($ev->getSaveData()));
+				file_put_contents($this->getPlayerDataPath($name), $nbt->writeCompressed($ev->getSaveData()));
 			}catch(\Throwable $e){
 				$this->logger->critical($this->getLanguage()->translateString("pocketmine.data.saveError", [$name, $e->getMessage()]));
 				$this->logger->logException($e);