diff --git a/phpstan.neon b/phpstan.neon
index fc850f100..3c03a2e31 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,7 +1,10 @@
-
+includes:
+	- tests/phpstan/configs/optional-com-dotnet.neon
+	- tests/phpstan/configs/phpstan-bugs.neon
+	- tests/phpstan/configs/pthreads-bugs.neon
 
 parameters:
-	level: 1
+	level: 2
 	autoload_files:
 		- tests/phpstan/bootstrap.php
 		- src/PocketMine.php
@@ -24,23 +27,6 @@ parameters:
 			count: 1
 			path: src/network/mcpe/protocol/StartGamePacket.php
 
-		-
-			message: "#^Instantiated class COM not found\\.$#"
-			count: 1
-			path: src/network/upnp/UPnP.php
-			comment: "only available on Windows"
-
-		-
-			message: "#^Caught class com_exception not found\\.$#"
-			count: 2
-			path: src/network/upnp/UPnP.php
-			comment: "only available on Windows"
-
-		-
-			message: "#^Variable \\$GLOBALS in isset\\(\\) always exists and is not nullable\\.$#"
-			path: src/MemoryManager.php
-			comment: "this isn't defined on threads (thanks pthreads)"
-
 		-
 			message: "#^Constant pocketmine\\\\COMPOSER_AUTOLOADER_PATH not found\\.$#"
 			path: src
@@ -64,3 +50,9 @@ parameters:
 		-
 			message: "#^Constant pocketmine\\\\VERSION not found\\.$#"
 			path: src
+
+		-
+			message: "#^Call to an undefined method pocketmine\\\\command\\\\CommandSender\\:\\:teleport\\(\\)\\.$#"
+			count: 1
+			path: src/command/defaults/TeleportCommand.php
+			comment: "not actually possible, but high cost to fix warning"
diff --git a/src/Server.php b/src/Server.php
index 62b98bc5a..4c3dfab55 100644
--- a/src/Server.php
+++ b/src/Server.php
@@ -200,7 +200,7 @@ class Server{
 	 * @var int
 	 */
 	private $tickCounter = 0;
-	/** @var int */
+	/** @var float */
 	private $nextTick = 0;
 	/** @var float[] */
 	private $tickAverage = [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20];
@@ -938,7 +938,7 @@ class Server{
 	}
 
 	/**
-	 * @return string[]
+	 * @return string[][]
 	 */
 	public function getCommandAliases() : array{
 		$section = $this->getProperty("aliases");
@@ -1323,7 +1323,7 @@ class Server{
 			return $this->broadcast($message, self::BROADCAST_CHANNEL_USERS);
 		}
 
-		/** @var Player[] $recipients */
+		/** @var CommandSender[] $recipients */
 		foreach($recipients as $recipient){
 			$recipient->sendMessage($message);
 		}
diff --git a/src/command/Command.php b/src/command/Command.php
index 6d7628b63..87aae29c3 100644
--- a/src/command/Command.php
+++ b/src/command/Command.php
@@ -55,7 +55,7 @@ abstract class Command{
 	 */
 	private $activeAliases = [];
 
-	/** @var CommandMap */
+	/** @var CommandMap|null */
 	private $commandMap = null;
 
 	/** @var string */
diff --git a/src/command/defaults/GamemodeCommand.php b/src/command/defaults/GamemodeCommand.php
index d520f9879..eb239c206 100644
--- a/src/command/defaults/GamemodeCommand.php
+++ b/src/command/defaults/GamemodeCommand.php
@@ -59,7 +59,6 @@ class GamemodeCommand extends VanillaCommand{
 			return true;
 		}
 
-		$target = $sender;
 		if(isset($args[1])){
 			$target = $sender->getServer()->getPlayer($args[1]);
 			if($target === null){
@@ -67,7 +66,9 @@ class GamemodeCommand extends VanillaCommand{
 
 				return true;
 			}
-		}elseif(!($sender instanceof Player)){
+		}elseif($sender instanceof Player){
+			$target = $sender;
+		}else{
 			throw new InvalidCommandSyntaxException();
 		}
 
diff --git a/src/crafting/CraftingManager.php b/src/crafting/CraftingManager.php
index 1196f6aa3..b35e6b42c 100644
--- a/src/crafting/CraftingManager.php
+++ b/src/crafting/CraftingManager.php
@@ -44,7 +44,7 @@ class CraftingManager{
 	/** @var FurnaceRecipe[] */
 	protected $furnaceRecipes = [];
 
-	/** @var CompressBatchPromise */
+	/** @var CompressBatchPromise|null */
 	private $craftingDataCache;
 
 	public function __construct(){
diff --git a/src/entity/Entity.php b/src/entity/Entity.php
index cb387ef06..c053aa161 100644
--- a/src/entity/Entity.php
+++ b/src/entity/Entity.php
@@ -99,8 +99,8 @@ abstract class Entity{
 	/** @var EntityDamageEvent|null */
 	protected $lastDamageCause = null;
 
-	/** @var Block[] */
-	protected $blocksAround = [];
+	/** @var Block[]|null */
+	protected $blocksAround;
 
 	/** @var Location */
 	protected $location;
diff --git a/src/entity/Squid.php b/src/entity/Squid.php
index e78a7ad2f..09cae8408 100644
--- a/src/entity/Squid.php
+++ b/src/entity/Squid.php
@@ -41,7 +41,7 @@ class Squid extends WaterAnimal{
 	public $width = 0.95;
 	public $height = 0.95;
 
-	/** @var Vector3 */
+	/** @var Vector3|null */
 	public $swimDirection = null;
 	public $swimSpeed = 0.1;
 
diff --git a/src/event/player/PlayerChatEvent.php b/src/event/player/PlayerChatEvent.php
index 9bafa319a..b5ee99ac4 100644
--- a/src/event/player/PlayerChatEvent.php
+++ b/src/event/player/PlayerChatEvent.php
@@ -23,11 +23,13 @@ declare(strict_types=1);
 
 namespace pocketmine\event\player;
 
+use pocketmine\command\CommandSender;
 use pocketmine\event\Cancellable;
 use pocketmine\event\CancellableTrait;
 use pocketmine\permission\PermissionManager;
 use pocketmine\player\Player;
 use pocketmine\Server;
+use function spl_object_id;
 
 /**
  * Called when a player chats something
@@ -42,15 +44,15 @@ class PlayerChatEvent extends PlayerEvent implements Cancellable{
 	protected $format;
 
 	/**
-	 * @var Player[]
+	 * @var CommandSender[]
 	 */
 	protected $recipients = [];
 
 	/**
-	 * @param Player   $player
-	 * @param string   $message
-	 * @param string   $format
-	 * @param Player[] $recipients
+	 * @param Player          $player
+	 * @param string          $message
+	 * @param string          $format
+	 * @param CommandSender[] $recipients
 	 */
 	public function __construct(Player $player, string $message, string $format = "chat.type.text", ?array $recipients = null){
 		$this->player = $player;
@@ -59,7 +61,11 @@ class PlayerChatEvent extends PlayerEvent implements Cancellable{
 		$this->format = $format;
 
 		if($recipients === null){
-			$this->recipients = PermissionManager::getInstance()->getPermissionSubscriptions(Server::BROADCAST_CHANNEL_USERS);
+			foreach(PermissionManager::getInstance()->getPermissionSubscriptions(Server::BROADCAST_CHANNEL_USERS) as $permissible){
+				if($permissible instanceof CommandSender){
+					$this->recipients[spl_object_id($permissible)] = $permissible;
+				}
+			}
 		}else{
 			$this->recipients = $recipients;
 		}
@@ -103,14 +109,14 @@ class PlayerChatEvent extends PlayerEvent implements Cancellable{
 	}
 
 	/**
-	 * @return Player[]
+	 * @return CommandSender[]
 	 */
 	public function getRecipients() : array{
 		return $this->recipients;
 	}
 
 	/**
-	 * @param Player[] $recipients
+	 * @param CommandSender[] $recipients
 	 */
 	public function setRecipients(array $recipients) : void{
 		$this->recipients = $recipients;
diff --git a/src/event/player/PlayerCreationEvent.php b/src/event/player/PlayerCreationEvent.php
index f3318058e..28f8290be 100644
--- a/src/event/player/PlayerCreationEvent.php
+++ b/src/event/player/PlayerCreationEvent.php
@@ -36,9 +36,9 @@ class PlayerCreationEvent extends Event{
 	/** @var NetworkSession */
 	private $session;
 
-	/** @var Player::class */
+	/** @var string */
 	private $baseClass = Player::class;
-	/** @var Player::class */
+	/** @var string */
 	private $playerClass = Player::class;
 
 
@@ -71,14 +71,14 @@ class PlayerCreationEvent extends Event{
 	}
 
 	/**
-	 * @return Player::class
+	 * @return string
 	 */
 	public function getBaseClass(){
 		return $this->baseClass;
 	}
 
 	/**
-	 * @param Player::class $class
+	 * @param string $class
 	 */
 	public function setBaseClass($class) : void{
 		if(!is_a($class, $this->baseClass, true)){
@@ -89,14 +89,14 @@ class PlayerCreationEvent extends Event{
 	}
 
 	/**
-	 * @return Player::class
+	 * @return string
 	 */
 	public function getPlayerClass(){
 		return $this->playerClass;
 	}
 
 	/**
-	 * @param Player::class $class
+	 * @param string $class
 	 */
 	public function setPlayerClass($class) : void{
 		if(!is_a($class, $this->baseClass, true)){
diff --git a/src/inventory/BaseInventory.php b/src/inventory/BaseInventory.php
index 1b9e5d298..6d5455dc9 100644
--- a/src/inventory/BaseInventory.php
+++ b/src/inventory/BaseInventory.php
@@ -37,7 +37,7 @@ abstract class BaseInventory implements Inventory{
 	/** @var int */
 	protected $maxStackSize = Inventory::MAX_STACK;
 	/** @var \SplFixedArray|Item[] */
-	protected $slots = [];
+	protected $slots;
 	/** @var Player[] */
 	protected $viewers = [];
 	/** @var InventoryChangeListener[] */
diff --git a/src/network/mcpe/protocol/AvailableCommandsPacket.php b/src/network/mcpe/protocol/AvailableCommandsPacket.php
index c54461b23..185505262 100644
--- a/src/network/mcpe/protocol/AvailableCommandsPacket.php
+++ b/src/network/mcpe/protocol/AvailableCommandsPacket.php
@@ -234,6 +234,7 @@ class AvailableCommandsPacket extends DataPacket implements ClientboundPacket{
 		$overloads = [];
 
 		for($overloadIndex = 0, $overloadCount = $this->getUnsignedVarInt(); $overloadIndex < $overloadCount; ++$overloadIndex){
+			$overloads[$overloadIndex] = [];
 			for($paramIndex = 0, $paramCount = $this->getUnsignedVarInt(); $paramIndex < $paramCount; ++$paramIndex){
 				$parameter = new CommandParameter();
 				$parameter->paramName = $this->getString();
diff --git a/src/network/mcpe/protocol/CraftingDataPacket.php b/src/network/mcpe/protocol/CraftingDataPacket.php
index d337ca873..3f36da6d8 100644
--- a/src/network/mcpe/protocol/CraftingDataPacket.php
+++ b/src/network/mcpe/protocol/CraftingDataPacket.php
@@ -139,7 +139,7 @@ class CraftingDataPacket extends DataPacket implements ClientboundPacket{
 			}
 			$this->decodedEntries[] = $entry;
 		}
-		$this->getBool(); //cleanRecipes
+		$this->cleanRecipes = $this->getBool();
 	}
 
 	private static function writeEntry($entry, NetworkBinaryStream $stream, int $pos) : int{
diff --git a/src/world/World.php b/src/world/World.php
index f88fd4c5f..533524246 100644
--- a/src/world/World.php
+++ b/src/world/World.php
@@ -236,7 +236,7 @@ class World implements ChunkManager{
 	/** @var WorldTimings */
 	public $timings;
 
-	/** @var int */
+	/** @var float */
 	public $tickRateTime = 0;
 
 	/** @var bool */
diff --git a/src/world/format/Chunk.php b/src/world/format/Chunk.php
index b91263130..63a92c27c 100644
--- a/src/world/format/Chunk.php
+++ b/src/world/format/Chunk.php
@@ -546,7 +546,7 @@ class Chunk{
 	 * @param World $world
 	 */
 	public function initChunk(World $world) : void{
-		if($this->NBTentities !== null){
+		if(!empty($this->NBTentities)){
 			$this->dirtyFlags |= self::DIRTY_FLAG_ENTITIES;
 			$world->timings->syncChunkLoadEntitiesTimer->startTiming();
 			foreach($this->NBTentities as $nbt){
@@ -564,10 +564,10 @@ class Chunk{
 				}
 			}
 
-			$this->NBTentities = null;
+			$this->NBTentities = [];
 			$world->timings->syncChunkLoadEntitiesTimer->stopTiming();
 		}
-		if($this->NBTtiles !== null){
+		if(!empty($this->NBTtiles)){
 			$this->dirtyFlags |= self::DIRTY_FLAG_TILES;
 			$world->timings->syncChunkLoadTileEntitiesTimer->startTiming();
 			foreach($this->NBTtiles as $nbt){
@@ -581,7 +581,7 @@ class Chunk{
 				}
 			}
 
-			$this->NBTtiles = null;
+			$this->NBTtiles = [];
 			$world->timings->syncChunkLoadTileEntitiesTimer->stopTiming();
 		}
 	}
diff --git a/tests/phpstan/configs/optional-com-dotnet.neon b/tests/phpstan/configs/optional-com-dotnet.neon
new file mode 100644
index 000000000..efa2d82ab
--- /dev/null
+++ b/tests/phpstan/configs/optional-com-dotnet.neon
@@ -0,0 +1,12 @@
+parameters:
+	ignoreErrors:
+		-
+			message: "#^Instantiated class COM not found\\.$#"
+			count: 2
+			path: src/pocketmine/network/upnp/UPnP.php
+
+		-
+			message: "#^Access to property \\$StaticPortMappingCollection on an unknown class COM\\.$#"
+			count: 4
+			path: src/pocketmine/network/upnp/UPnP.php
+
diff --git a/tests/phpstan/configs/phpstan-bugs.neon b/tests/phpstan/configs/phpstan-bugs.neon
new file mode 100644
index 000000000..90fef5cea
--- /dev/null
+++ b/tests/phpstan/configs/phpstan-bugs.neon
@@ -0,0 +1,10 @@
+parameters:
+	ignoreErrors:
+		-
+			message: "#^PHPDoc tag @param has invalid value \\(.+\\)\\: Unexpected token \"&\", expected TOKEN_VARIABLE at offset \\d+$#"
+			path: src/pocketmine
+
+		-
+			message: "#^Default value of the parameter \\#\\d+ \\$[A-Za-z\\d_]+ \\(\\-?\\d+\\) of method .+\\(\\) is incompatible with type float\\.$#"
+			path: src/pocketmine
+
diff --git a/tests/phpstan/configs/pthreads-bugs.neon b/tests/phpstan/configs/pthreads-bugs.neon
new file mode 100644
index 000000000..987af95c0
--- /dev/null
+++ b/tests/phpstan/configs/pthreads-bugs.neon
@@ -0,0 +1,6 @@
+parameters:
+	ignoreErrors:
+		-
+			message: "#^Variable \\$GLOBALS in isset\\(\\) always exists and is not nullable\\.$#"
+			path: src/MemoryManager.php
+