populate remaining missing return types, using native returns where possible

this is done separately to stable so that stable changes can be integrated easily using an empty merge.

src/Server.php

@@ -1744,7 +1744,7 @@ class Server{
 		exit(1);
 	}
 
-	public function __debugInfo(){
+	public function __debugInfo() : array{
 		return [];
 	}
 

src/block/tile/Chest.php

@@ -136,7 +136,7 @@ class Chest extends Spawnable implements Container, Nameable{
 		return $this->inventory;
 	}
 
-	protected function checkPairing(){
+	protected function checkPairing() : void{
 		if($this->isPaired() and !$this->pos->getWorld()->isInLoadedTerrain(new Vector3($this->pairX, $this->pos->y, $this->pairZ))){
 			//paired to a tile in an unloaded chunk
 			$this->doubleInventory = null;
@@ -170,7 +170,7 @@ class Chest extends Spawnable implements Container, Nameable{
 		return "Chest";
 	}
 
-	public function isPaired(){
+	public function isPaired() : bool{
 		return $this->pairX !== null and $this->pairZ !== null;
 	}
 
@@ -188,7 +188,7 @@ class Chest extends Spawnable implements Container, Nameable{
 		return null;
 	}
 
-	public function pairWith(Chest $tile){
+	public function pairWith(Chest $tile) : bool{
 		if($this->isPaired() or $tile->isPaired()){
 			return false;
 		}
@@ -202,7 +202,7 @@ class Chest extends Spawnable implements Container, Nameable{
 		return true;
 	}
 
-	private function createPair(Chest $tile){
+	private function createPair(Chest $tile) : void{
 		$this->pairX = $tile->getPos()->x;
 		$this->pairZ = $tile->getPos()->z;
 
@@ -210,7 +210,7 @@ class Chest extends Spawnable implements Container, Nameable{
 		$tile->pairZ = $this->getPos()->z;
 	}
 
-	public function unpair(){
+	public function unpair() : bool{
 		if(!$this->isPaired()){
 			return false;
 		}

src/block/tile/Furnace.php

@@ -120,7 +120,7 @@ class Furnace extends Spawnable implements Container, Nameable{
 		return $this->getInventory();
 	}
 
-	protected function checkFuel(Item $fuel){
+	protected function checkFuel(Item $fuel) : void{
 		$ev = new FurnaceBurnEvent($this, $fuel, $fuel->getFuelTime());
 		$ev->call();
 		if($ev->isCancelled()){

src/command/PluginCommand.php

@@ -72,7 +72,7 @@ class PluginCommand extends Command implements PluginIdentifiableCommand{
 	/**
 	 * @param CommandExecutor $executor
 	 */
-	public function setExecutor(CommandExecutor $executor){
+	public function setExecutor(CommandExecutor $executor) : void{
 		$this->executor = $executor;
 	}
 

src/inventory/CreativeInventory.php

@@ -38,7 +38,7 @@ final class CreativeInventory{
 		//NOOP
 	}
 
-	public static function init(){
+	public static function init() : void{
 		self::clear();
 
 		$creativeItems = json_decode(file_get_contents(\pocketmine\RESOURCE_PATH . "vanilla" . DIRECTORY_SEPARATOR . "creativeitems.json"), true);
@@ -56,7 +56,7 @@ final class CreativeInventory{
 	 * Removes all previously added items from the creative menu.
 	 * Note: Players who are already online when this is called will not see this change.
 	 */
-	public static function clear(){
+	public static function clear() : void{
 		self::$creative = [];
 	}
 
@@ -92,7 +92,7 @@ final class CreativeInventory{
 	 *
 	 * @param Item $item
 	 */
-	public static function add(Item $item){
+	public static function add(Item $item) : void{
 		self::$creative[] = clone $item;
 	}
 
@@ -102,7 +102,7 @@ final class CreativeInventory{
 	 *
 	 * @param Item $item
 	 */
-	public static function remove(Item $item){
+	public static function remove(Item $item) : void{
 		$index = self::getItemIndex($item);
 		if($index !== -1){
 			unset(self::$creative[$index]);

src/lang/Language.php

@@ -140,7 +140,7 @@ class Language{
 		return $baseText;
 	}
 
-	public function translate(TextContainer $c){
+	public function translate(TextContainer $c) : string{
 		if($c instanceof TranslationContainer){
 			$baseText = $this->internalGet($c->getText());
 			$baseText = $this->parseTranslation($baseText ?? $c->getText());

src/network/mcpe/protocol/DataPacket.php

@@ -104,7 +104,7 @@ abstract class DataPacket extends NetworkBinaryStream implements Packet{
 	 */
 	abstract protected function encodePayload() : void;
 
-	public function __debugInfo(){
+	public function __debugInfo() : array{
 		$data = [];
 		foreach((array) $this as $k => $v){
 			if($v === $this->getBuffer()){
@@ -121,6 +121,8 @@ abstract class DataPacket extends NetworkBinaryStream implements Packet{
 
 	/**
 	 * @param string $name
+	 *
+	 * @return mixed
 	 */
 	public function __get($name){
 		throw new \Error("Undefined property: " . get_class($this) . "::\$" . $name);
@@ -130,7 +132,7 @@ abstract class DataPacket extends NetworkBinaryStream implements Packet{
 	 * @param string $name
 	 * @param mixed  $value
 	 */
-	public function __set($name, $value){
+	public function __set($name, $value) : void{
 		throw new \Error("Undefined property: " . get_class($this) . "::\$" . $name);
 	}
 }

src/permission/DefaultPermissions.php

@@ -43,7 +43,7 @@ abstract class DefaultPermissions{
 		return PermissionManager::getInstance()->getPermission($perm->getName());
 	}
 
-	public static function registerCorePermissions(){
+	public static function registerCorePermissions() : void{
 		$parent = self::registerPermission(new Permission(self::ROOT, "Allows using all PocketMine commands and utilities"));
 
 		$broadcasts = self::registerPermission(new Permission(self::ROOT . ".broadcast", "Allows the user to receive all broadcast messages"), $parent);

src/player/OfflinePlayer.php

@@ -54,7 +54,7 @@ class OfflinePlayer implements IPlayer{
 		return $this->name;
 	}
 
-	public function getServer(){
+	public function getServer() : Server{
 		return $this->server;
 	}
 

src/player/Player.php

@@ -464,7 +464,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		return $this->lastPlayed - $this->firstPlayed > 1; // microtime(true) - microtime(true) may have less than one millisecond difference
 	}
 
-	public function setAllowFlight(bool $value){
+	public function setAllowFlight(bool $value) : void{
 		$this->allowFlight = $value;
 		$this->networkSession->syncAdventureSettings($this);
 	}
@@ -473,7 +473,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		return $this->allowFlight;
 	}
 
-	public function setFlying(bool $value){
+	public function setFlying(bool $value) : void{
 		if($this->flying !== $value){
 			$this->flying = $value;
 			$this->resetFallDistance();
@@ -485,7 +485,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		return $this->flying;
 	}
 
-	public function setAutoJump(bool $value){
+	public function setAutoJump(bool $value) : void{
 		$this->autoJump = $value;
 		$this->networkSession->syncAdventureSettings($this);
 	}
@@ -520,7 +520,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 	/**
 	 * @param bool $remove
 	 */
-	public function setRemoveFormat(bool $remove = true){
+	public function setRemoveFormat(bool $remove = true) : void{
 		$this->removeFormat = $remove;
 	}
 
@@ -547,7 +547,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 	/**
 	 * @param Player $player
 	 */
-	public function hidePlayer(Player $player){
+	public function hidePlayer(Player $player) : void{
 		if($player === $this){
 			return;
 		}
@@ -558,7 +558,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 	/**
 	 * @param Player $player
 	 */
-	public function showPlayer(Player $player){
+	public function showPlayer(Player $player) : void{
 		if($player === $this){
 			return;
 		}
@@ -585,7 +585,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		return $this->viewDistance;
 	}
 
-	public function setViewDistance(int $distance){
+	public function setViewDistance(int $distance) : void{
 		$this->viewDistance = $this->server->getAllowedViewDistance($distance);
 
 		$this->spawnThreshold = (int) (min($this->viewDistance, $this->server->getProperty("chunk-sending.spawn-radius", 4)) ** 2 * M_PI);
@@ -685,7 +685,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 	/**
 	 * @param string $name
 	 */
-	public function setDisplayName(string $name){
+	public function setDisplayName(string $name) : void{
 		$this->displayName = $name;
 	}
 
@@ -738,7 +738,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		return $this->startAction > -1;
 	}
 
-	public function setUsingItem(bool $value){
+	public function setUsingItem(bool $value) : void{
 		$this->startAction = $value ? $this->server->getTick() : -1;
 	}
 
@@ -805,7 +805,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		return false;
 	}
 
-	protected function unloadChunk(int $x, int $z, ?World $world = null){
+	protected function unloadChunk(int $x, int $z, ?World $world = null) : void{
 		$world = $world ?? $this->getWorld();
 		$index = World::chunkHash($x, $z);
 		if(isset($this->usedChunks[$index])){
@@ -830,7 +830,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		}
 	}
 
-	protected function requestChunks(){
+	protected function requestChunks() : void{
 		if(!$this->isConnected()){
 			return;
 		}
@@ -883,7 +883,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		Timings::$playerChunkSendTimer->stopTiming();
 	}
 
-	public function doFirstSpawn(){
+	public function doFirstSpawn() : void{
 		if($this->hasPermission(Server::BROADCAST_CHANNEL_USERS)){
 			PermissionManager::getInstance()->subscribeToPermission(Server::BROADCAST_CHANNEL_USERS, $this);
 		}
@@ -986,7 +986,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		return isset($this->usedChunks[World::chunkHash($chunkX, $chunkZ)]);
 	}
 
-	public function doChunkRequests(){
+	public function doChunkRequests() : void{
 		if($this->nextChunkOrderRun !== PHP_INT_MAX and $this->nextChunkOrderRun-- <= 0){
 			$this->nextChunkOrderRun = PHP_INT_MAX;
 			$this->orderChunks();
@@ -1023,7 +1023,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 	 *
 	 * @param Vector3|Position $pos
 	 */
-	public function setSpawn(Vector3 $pos){
+	public function setSpawn(Vector3 $pos) : void{
 		if(!($pos instanceof Position)){
 			$world = $this->getWorld();
 		}else{
@@ -1068,7 +1068,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		return true;
 	}
 
-	public function stopSleep(){
+	public function stopSleep() : void{
 		if($this->sleeping instanceof Vector3){
 			$b = $this->getWorld()->getBlock($this->sleeping);
 			if($b instanceof Bed){
@@ -1218,7 +1218,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		return false; //currently has no server-side movement
 	}
 
-	protected function checkNearEntities(){
+	protected function checkNearEntities() : void{
 		foreach($this->getWorld()->getNearbyEntities($this->boundingBox->expandedCopy(1, 0.5, 1), $this) as $entity){
 			$entity->scheduleUpdate();
 
@@ -1274,7 +1274,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		return $this->inAirTicks;
 	}
 
-	protected function processMovement(int $tickDiff){
+	protected function processMovement(int $tickDiff) : void{
 		if($this->newPosition === null or $this->isSleeping()){
 			return;
 		}
@@ -1923,14 +1923,14 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 	/**
 	 * Removes the title from the client's screen.
 	 */
-	public function removeTitles(){
+	public function removeTitles() : void{
 		$this->networkSession->onClearTitle();
 	}
 
 	/**
 	 * Resets the title duration settings to defaults and removes any existing titles.
 	 */
-	public function resetTitles(){
+	public function resetTitles() : void{
 		$this->networkSession->onResetTitleOptions();
 	}
 
@@ -1941,7 +1941,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 	 * @param int $stay Title stay time in ticks.
 	 * @param int $fadeOut Title fade-out time in ticks.
 	 */
-	public function setTitleDuration(int $fadeIn, int $stay, int $fadeOut){
+	public function setTitleDuration(int $fadeIn, int $stay, int $fadeOut) : void{
 		if($fadeIn >= 0 and $stay >= 0 and $fadeOut >= 0){
 			$this->networkSession->onTitleDuration($fadeIn, $stay, $fadeOut);
 		}
@@ -1968,7 +1968,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 	 * @param string   $message
 	 * @param string[] $parameters
 	 */
-	public function sendTranslation(string $message, array $parameters = []){
+	public function sendTranslation(string $message, array $parameters = []) : void{
 		if(!$this->server->isLanguageForced()){
 			foreach($parameters as $i => $p){
 				$parameters[$i] = $this->server->getLanguage()->translateString($p, [], "pocketmine.");
@@ -1986,11 +1986,11 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 	 *
 	 * @param string $message
 	 */
-	public function sendPopup(string $message){
+	public function sendPopup(string $message) : void{
 		$this->networkSession->onPopup($message);
 	}
 
-	public function sendTip(string $message){
+	public function sendTip(string $message) : void{
 		$this->networkSession->onTip($message);
 	}
 
@@ -2160,7 +2160,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		parent::destroyCycles();
 	}
 
-	public function __debugInfo(){
+	public function __debugInfo() : array{
 		return [];
 	}
 
@@ -2182,7 +2182,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 	 *
 	 * @throws \InvalidStateException if the player is closed
 	 */
-	public function save(){
+	public function save() : void{
 		if($this->closed){
 			throw new \InvalidStateException("Tried to save closed player");
 		}
@@ -2353,7 +2353,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 	 * @param float|null $pitch
 	 * @param int        $mode
 	 */
-	public function sendPosition(Vector3 $pos, ?float $yaw = null, ?float $pitch = null, int $mode = MovePlayerPacket::MODE_NORMAL){
+	public function sendPosition(Vector3 $pos, ?float $yaw = null, ?float $pitch = null, int $mode = MovePlayerPacket::MODE_NORMAL) : void{
 		$this->networkSession->syncMovement($pos, $yaw, $pitch, $mode);
 
 		//TODO: get rid of this
@@ -2390,7 +2390,7 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		return false;
 	}
 
-	protected function addDefaultWindows(){
+	protected function addDefaultWindows() : void{
 		$this->cursorInventory = new PlayerCursorInventory($this);
 		$this->craftingGrid = new CraftingGrid($this, CraftingGrid::SIZE_SMALL);
 

src/plugin/PluginBase.php

@@ -100,6 +100,8 @@ abstract class PluginBase implements Plugin, CommandExecutor{
 
 	/**
 	 * Called when the plugin is loaded, before calling onEnable()
+	 *
+	 * @return void
 	 */
 	protected function onLoad()/* : void /* TODO: uncomment this for next major version */{
 
@@ -107,6 +109,8 @@ abstract class PluginBase implements Plugin, CommandExecutor{
 
 	/**
 	 * Called when the plugin is enabled
+	 *
+	 * @return void
 	 */
 	protected function onEnable()/* : void /* TODO: uncomment this for next major version */{
 
@@ -115,6 +119,8 @@ abstract class PluginBase implements Plugin, CommandExecutor{
 	/**
 	 * Called when the plugin is disabled
 	 * Use this to free open things and finish actions
+	 *
+	 * @return void
 	 */
 	protected function onDisable()/* : void /* TODO: uncomment this for next major version */{
 
@@ -320,7 +326,7 @@ abstract class PluginBase implements Plugin, CommandExecutor{
 		return $this->config;
 	}
 
-	public function saveConfig(){
+	public function saveConfig() : void{
 		$this->getConfig()->save();
 	}
 
@@ -331,7 +337,7 @@ abstract class PluginBase implements Plugin, CommandExecutor{
 		return false;
 	}
 
-	public function reloadConfig(){
+	public function reloadConfig() : void{
 		$this->saveDefaultConfig();
 		$this->config = new Config($this->configFile);
 	}

src/scheduler/Task.php

@@ -72,6 +72,8 @@ abstract class Task{
 
 	/**
 	 * Actions to execute if the Task is cancelled
+	 *
+	 * @return void
 	 */
 	public function onCancel(){
 

src/thread/CommonThreadPartsTrait.php

@@ -35,7 +35,7 @@ trait CommonThreadPartsTrait{
 	/** @var bool */
 	protected $isKilled = false;
 
-	public function getClassLoader(){
+	public function getClassLoader() : ?\ClassLoader{
 		return $this->classLoader;
 	}
 

src/utils/Config.php

@@ -319,7 +319,7 @@ class Config{
 	 * @param string $k
 	 * @param mixed  $v
 	 */
-	public function __set($k, $v){
+	public function __set($k, $v) : void{
 		$this->set($k, $v);
 	}
 

src/utils/MainLogger.php

@@ -151,6 +151,8 @@ class MainLogger extends \AttachableThreadedLogger{
 	/**
 	 * @param \Throwable $e
 	 * @param array|null $trace
+	 *
+	 * @return void
 	 */
 	public function logException(\Throwable $e, $trace = null){
 		if($trace === null){

src/world/World.php

@@ -386,7 +386,7 @@ class World implements ChunkManager{
 		$this->server->getAsyncPool()->submitTaskToWorker(new GeneratorRegisterTask($this, $this->generator, $this->provider->getWorldData()->getGeneratorOptions()), $worker);
 	}
 
-	public function unregisterGenerator(){
+	public function unregisterGenerator() : void{
 		$pool = $this->server->getAsyncPool();
 		foreach($pool->getRunningWorkers() as $i){
 			if(isset($this->generatorRegisteredWorkers[$i])){
@@ -422,7 +422,7 @@ class World implements ChunkManager{
 	/**
 	 * @internal
 	 */
-	public function close(){
+	public function close() : void{
 		if($this->closed){
 			throw new \InvalidStateException("Tried to close a world which is already closed");
 		}
@@ -443,7 +443,7 @@ class World implements ChunkManager{
 		$this->closed = true;
 	}
 
-	public function addSound(Vector3 $pos, Sound $sound, ?array $players = null){
+	public function addSound(Vector3 $pos, Sound $sound, ?array $players = null) : void{
 		$pk = $sound->encode($pos);
 		if(!is_array($pk)){
 			$pk = [$pk];
@@ -459,7 +459,7 @@ class World implements ChunkManager{
 		}
 	}
 
-	public function addParticle(Vector3 $pos, Particle $particle, ?array $players = null){
+	public function addParticle(Vector3 $pos, Particle $particle, ?array $players = null) : void{
 		$pk = $particle->encode($pos);
 		if(!is_array($pk)){
 			$pk = [$pk];
@@ -482,7 +482,7 @@ class World implements ChunkManager{
 	 * @param int          $evid
 	 * @param int          $data
 	 */
-	public function broadcastLevelEvent(?Vector3 $pos, int $evid, int $data = 0){
+	public function broadcastLevelEvent(?Vector3 $pos, int $evid, int $data = 0) : void{
 		$pk = LevelEventPacket::create($evid, $data, $pos);
 		if($pos !== null){
 			$this->broadcastPacketToViewers($pos, $pk);
@@ -495,7 +495,7 @@ class World implements ChunkManager{
 		return $this->autoSave;
 	}
 
-	public function setAutoSave(bool $value){
+	public function setAutoSave(bool $value) : void{
 		$this->autoSave = $value;
 	}
 
@@ -544,7 +544,7 @@ class World implements ChunkManager{
 	 * @param int               $chunkZ
 	 * @param ClientboundPacket $packet
 	 */
-	public function addChunkPacket(int $chunkX, int $chunkZ, ClientboundPacket $packet){
+	public function addChunkPacket(int $chunkX, int $chunkZ, ClientboundPacket $packet) : void{
 		if(!isset($this->chunkPackets[$index = World::chunkHash($chunkX, $chunkZ)])){
 			$this->chunkPackets[$index] = [$packet];
 		}else{
@@ -571,7 +571,7 @@ class World implements ChunkManager{
 		$this->globalPackets[] = $packet;
 	}
 
-	public function registerChunkLoader(ChunkLoader $loader, int $chunkX, int $chunkZ, bool $autoLoad = true){
+	public function registerChunkLoader(ChunkLoader $loader, int $chunkX, int $chunkZ, bool $autoLoad = true) : void{
 		$loaderId = spl_object_id($loader);
 
 		if(!isset($this->chunkLoaders[$chunkHash = World::chunkHash($chunkX, $chunkZ)])){
@@ -600,7 +600,7 @@ class World implements ChunkManager{
 		}
 	}
 
-	public function unregisterChunkLoader(ChunkLoader $loader, int $chunkX, int $chunkZ){
+	public function unregisterChunkLoader(ChunkLoader $loader, int $chunkX, int $chunkZ) : void{
 		$chunkHash = World::chunkHash($chunkX, $chunkZ);
 		$loaderId = spl_object_id($loader);
 		if(isset($this->chunkLoaders[$chunkHash][$loaderId])){
@@ -689,7 +689,7 @@ class World implements ChunkManager{
 	 *
 	 * @param Player ...$targets If empty, will send to all players in the world.
 	 */
-	public function sendTime(Player ...$targets){
+	public function sendTime(Player ...$targets) : void{
 		$pk = SetTimePacket::create($this->time);
 
 		if(empty($targets)){
@@ -709,7 +709,7 @@ class World implements ChunkManager{
 	 * @param int $currentTick
 	 *
 	 */
-	public function doTick(int $currentTick){
+	public function doTick(int $currentTick) : void{
 		if($this->closed){
 			throw new \InvalidStateException("Attempted to tick a world which has been closed");
 		}
@@ -852,7 +852,7 @@ class World implements ChunkManager{
 		$this->chunkPackets = [];
 	}
 
-	public function checkSleep(){
+	public function checkSleep() : void{
 		if(count($this->players) === 0){
 			return;
 		}
@@ -886,7 +886,7 @@ class World implements ChunkManager{
 	 * @param Player[]  $target
 	 * @param Vector3[] $blocks
 	 */
-	public function sendBlocks(array $target, array $blocks){
+	public function sendBlocks(array $target, array $blocks) : void{
 		$packets = [];
 
 		foreach($blocks as $b){
@@ -906,7 +906,7 @@ class World implements ChunkManager{
 		$this->server->broadcastPackets($target, $packets);
 	}
 
-	public function clearCache(bool $force = false){
+	public function clearCache(bool $force = false) : void{
 		if($force){
 			$this->blockCache = [];
 		}else{
@@ -928,18 +928,18 @@ class World implements ChunkManager{
 		return $this->randomTickBlocks;
 	}
 
-	public function addRandomTickedBlock(Block $block){
+	public function addRandomTickedBlock(Block $block) : void{
 		if($block instanceof UnknownBlock){
 			throw new \InvalidArgumentException("Cannot do random-tick on unknown block");
 		}
 		$this->randomTickBlocks[$block->getFullId()] = true;
 	}
 
-	public function removeRandomTickedBlock(Block $block){
+	public function removeRandomTickedBlock(Block $block) : void{
 		unset($this->randomTickBlocks[$block->getFullId()]);
 	}
 
-	private function tickChunks(){
+	private function tickChunks() : void{
 		if($this->chunksPerTick <= 0 or count($this->loaders) === 0){
 			return;
 		}
@@ -1029,7 +1029,7 @@ class World implements ChunkManager{
 		return true;
 	}
 
-	public function saveChunks(){
+	public function saveChunks() : void{
 		$this->timings->syncChunkSaveTimer->startTiming();
 		try{
 			foreach($this->chunks as $chunk){
@@ -1050,7 +1050,7 @@ class World implements ChunkManager{
 	 * @param Vector3 $pos
 	 * @param int     $delay
 	 */
-	public function scheduleDelayedBlockUpdate(Vector3 $pos, int $delay){
+	public function scheduleDelayedBlockUpdate(Vector3 $pos, int $delay) : void{
 		if(
 			!$this->isInWorld($pos->x, $pos->y, $pos->z) or
 			(isset($this->scheduledBlockUpdateQueueIndex[$index = World::blockHash($pos->x, $pos->y, $pos->z)]) and $this->scheduledBlockUpdateQueueIndex[$index] <= $delay)
@@ -1994,7 +1994,7 @@ class World implements ChunkManager{
 	 * @param int $z
 	 * @param int $biomeId
 	 */
-	public function setBiomeId(int $x, int $z, int $biomeId){
+	public function setBiomeId(int $x, int $z, int $biomeId) : void{
 		$this->getChunk($x >> 4, $z >> 4, true)->setBiomeId($x & 0x0f, $z & 0x0f, $biomeId);
 	}
 
@@ -2076,7 +2076,7 @@ class World implements ChunkManager{
 		return isset($this->chunkLock[World::chunkHash($chunkX, $chunkZ)]);
 	}
 
-	public function generateChunkCallback(int $x, int $z, ?Chunk $chunk){
+	public function generateChunkCallback(int $x, int $z, ?Chunk $chunk) : void{
 		Timings::$generationCallbackTimer->startTiming();
 		if(isset($this->chunkPopulationQueue[$index = World::chunkHash($x, $z)])){
 			for($xx = -1; $xx <= 1; ++$xx){
@@ -2234,7 +2234,7 @@ class World implements ChunkManager{
 	 *
 	 * @param Vector3 $pos
 	 */
-	public function setSpawnLocation(Vector3 $pos){
+	public function setSpawnLocation(Vector3 $pos) : void{
 		$previousSpawn = $this->getSpawnLocation();
 		$this->provider->getWorldData()->setSpawn($pos);
 		(new SpawnChangeEvent($this, $previousSpawn))->call();
@@ -2245,7 +2245,7 @@ class World implements ChunkManager{
 	 *
 	 * @throws \InvalidArgumentException
 	 */
-	public function addEntity(Entity $entity){
+	public function addEntity(Entity $entity) : void{
 		if($entity->isClosed()){
 			throw new \InvalidArgumentException("Attempted to add a garbage closed Entity to world");
 		}
@@ -2266,7 +2266,7 @@ class World implements ChunkManager{
 	 *
 	 * @throws \InvalidArgumentException
 	 */
-	public function removeEntity(Entity $entity){
+	public function removeEntity(Entity $entity) : void{
 		if($entity->getWorld() !== $this){
 			throw new \InvalidArgumentException("Invalid Entity world");
 		}
@@ -2285,7 +2285,7 @@ class World implements ChunkManager{
 	 *
 	 * @throws \InvalidArgumentException
 	 */
-	public function addTile(Tile $tile){
+	public function addTile(Tile $tile) : void{
 		if($tile->isClosed()){
 			throw new \InvalidArgumentException("Attempted to add a garbage closed Tile to world");
 		}
@@ -2312,7 +2312,7 @@ class World implements ChunkManager{
 	 *
 	 * @throws \InvalidArgumentException
 	 */
-	public function removeTile(Tile $tile){
+	public function removeTile(Tile $tile) : void{
 		$pos = $tile->getPos();
 		if($pos->getWorld() !== $this){
 			throw new \InvalidArgumentException("Invalid Tile world");
@@ -2404,11 +2404,11 @@ class World implements ChunkManager{
 		return true;
 	}
 
-	private function queueUnloadChunk(int $x, int $z){
+	private function queueUnloadChunk(int $x, int $z) : void{
 		$this->unloadQueue[World::chunkHash($x, $z)] = microtime(true);
 	}
 
-	public function unloadChunkRequest(int $x, int $z, bool $safe = true){
+	public function unloadChunkRequest(int $x, int $z, bool $safe = true) : bool{
 		if(($safe and $this->isChunkInUse($x, $z)) or $this->isSpawnChunk($x, $z)){
 			return false;
 		}
@@ -2418,7 +2418,7 @@ class World implements ChunkManager{
 		return true;
 	}
 
-	public function cancelUnloadChunkRequest(int $x, int $z){
+	public function cancelUnloadChunkRequest(int $x, int $z) : void{
 		unset($this->unloadQueue[World::chunkHash($x, $z)]);
 	}
 
@@ -2574,7 +2574,7 @@ class World implements ChunkManager{
 	 *
 	 * @param int $time
 	 */
-	public function setTime(int $time){
+	public function setTime(int $time) : void{
 		$this->time = $time;
 		$this->sendTime();
 	}
@@ -2582,7 +2582,7 @@ class World implements ChunkManager{
 	/**
 	 * Stops the time for the world, will not save the lock state to disk
 	 */
-	public function stopTime(){
+	public function stopTime() : void{
 		$this->stopTime = true;
 		$this->sendTime();
 	}
@@ -2590,7 +2590,7 @@ class World implements ChunkManager{
 	/**
 	 * Start the time again, if it was stopped
 	 */
-	public function startTime(){
+	public function startTime() : void{
 		$this->stopTime = false;
 		$this->sendTime();
 	}
@@ -2618,7 +2618,7 @@ class World implements ChunkManager{
 	/**
 	 * @param int $difficulty
 	 */
-	public function setDifficulty(int $difficulty){
+	public function setDifficulty(int $difficulty) : void{
 		if($difficulty < 0 or $difficulty > 3){
 			throw new \InvalidArgumentException("Invalid difficulty level $difficulty");
 		}
@@ -2630,7 +2630,7 @@ class World implements ChunkManager{
 	/**
 	 * @param Player ...$targets
 	 */
-	public function sendDifficulty(Player ...$targets){
+	public function sendDifficulty(Player ...$targets) : void{
 		$pk = SetDifficultyPacket::create($this->getDifficulty());
 		if(empty($targets)){
 			$this->broadcastGlobalPacket($pk);
@@ -2676,7 +2676,7 @@ class World implements ChunkManager{
 		return true;
 	}
 
-	public function doChunkGarbageCollection(){
+	public function doChunkGarbageCollection() : void{
 		$this->timings->doChunkGC->startTiming();
 
 		foreach($this->chunks as $index => $chunk){
@@ -2694,7 +2694,7 @@ class World implements ChunkManager{
 		$this->timings->doChunkGC->stopTiming();
 	}
 
-	public function unloadChunks(bool $force = false){
+	public function unloadChunks(bool $force = false) : void{
 		if(count($this->unloadQueue) > 0){
 			$maxUnload = 96;
 			$now = microtime(true);

src/world/format/SubChunk.php

@@ -111,7 +111,7 @@ class SubChunk implements SubChunkInterface{
 		$this->blockLight = $data;
 	}
 
-	public function __debugInfo(){
+	public function __debugInfo() : array{
 		return [];
 	}