Here is a list of all documented variables with links to the class documentation for each member:

- $ -

$action : pocketmine\network\mcpe\protocol\PlayerActionPacket
$addition : pocketmine\crafting\json\SmithingTransformRecipeData, pocketmine\crafting\json\SmithingTrimRecipeData
$address : pocketmine\network\mcpe\raklib\RakLibServer
$alg : pocketmine\network\mcpe\protocol\types\login\JwtHeader
$AnimationExpression : pocketmine\network\mcpe\protocol\types\login\ClientDataAnimationFrame
$ArmSize : pocketmine\network\mcpe\protocol\types\login\ClientData
$base_version : pocketmine\updater\UpdateInfo
$block : pocketmine\crafting\json\FurnaceRecipeData, pocketmine\crafting\json\ShapedRecipeData, pocketmine\crafting\json\ShapelessRecipeData, pocketmine\crafting\json\SmithingTransformRecipeData, pocketmine\crafting\json\SmithingTrimRecipeData
$blockEntityTag : pocketmine\item\Item
$blockPaletteChecksum : pocketmine\network\mcpe\protocol\StartGamePacket
$blockPosition : pocketmine\network\mcpe\protocol\types\MapTrackedObject
$build : pocketmine\updater\UpdateInfo
$CapeData : pocketmine\network\mcpe\protocol\types\login\ClientData
$CapeId : pocketmine\network\mcpe\protocol\types\login\ClientData
$CapeImageHeight : pocketmine\network\mcpe\protocol\types\login\ClientData
$CapeImageWidth : pocketmine\network\mcpe\protocol\types\login\ClientData
$CapeOnClassicSkin : pocketmine\network\mcpe\protocol\types\login\ClientData
$causingBlockPosition : pocketmine\network\mcpe\protocol\SetSpawnPositionPacket
$channel : pocketmine\updater\UpdateInfo
$ClientRandomId : pocketmine\network\mcpe\protocol\types\login\ClientData
$CompatibleWithClientSideChunkGen : pocketmine\network\mcpe\protocol\types\login\ClientData
$compressor : pocketmine\network\mcpe\ChunkRequestTask
$CurrentInputMode : pocketmine\network\mcpe\protocol\types\login\ClientData
$date : pocketmine\updater\UpdateInfo
$DefaultInputMode : pocketmine\network\mcpe\protocol\types\login\ClientData
$definitions : pocketmine\network\mcpe\protocol\BiomeDefinitionListPacket
$details_url : pocketmine\updater\UpdateInfo
$DeviceId : pocketmine\network\mcpe\protocol\types\login\ClientData
$DeviceModel : pocketmine\network\mcpe\protocol\types\login\ClientData
$DeviceOS : pocketmine\network\mcpe\protocol\types\login\ClientData
$displayName : pocketmine\network\mcpe\protocol\types\login\AuthenticationData
$download_url : pocketmine\updater\UpdateInfo
$entity : pocketmine\event\entity\EntityEvent
$eventId : pocketmine\network\mcpe\protocol\ActorEventPacket, pocketmine\network\mcpe\protocol\LevelEventPacket
$flattenedProperty : pocketmine\data\bedrock\block\upgrade\model\BlockStateUpgradeSchemaModelFlattenInfo
$format_version : pocketmine\resourcepacks\json\Manifest
$Frames : pocketmine\network\mcpe\protocol\types\login\ClientDataAnimationFrame
$GameVersion : pocketmine\network\mcpe\protocol\types\login\ClientData
$git_commit : pocketmine\updater\UpdateInfo
$GuiScale : pocketmine\network\mcpe\protocol\types\login\ClientData
$header : pocketmine\resourcepacks\json\Manifest
$identifiers : pocketmine\network\mcpe\protocol\AvailableActorIdentifiersPacket
$identity : pocketmine\network\mcpe\protocol\types\login\AuthenticationData
$Image : pocketmine\network\mcpe\protocol\types\login\ClientDataAnimationFrame
$ImageHeight : pocketmine\network\mcpe\protocol\types\login\ClientDataAnimationFrame
$ImageWidth : pocketmine\network\mcpe\protocol\types\login\ClientDataAnimationFrame
$ingredient : pocketmine\crafting\json\PotionContainerChangeRecipeData, pocketmine\crafting\json\PotionTypeRecipeData
$input : pocketmine\crafting\json\FurnaceRecipeData, pocketmine\crafting\json\PotionTypeRecipeData, pocketmine\crafting\json\SmithingTransformRecipeData, pocketmine\crafting\json\SmithingTrimRecipeData
$input_item_name : pocketmine\crafting\json\PotionContainerChangeRecipeData
$inventory : pocketmine\block\Campfire
$is_dev : pocketmine\updater\UpdateInfo
$IsDefault : pocketmine\network\mcpe\protocol\types\login\ClientDataPersonaSkinPiece
$IsEditorMode : pocketmine\network\mcpe\protocol\types\login\ClientData
$jwt : pocketmine\network\mcpe\protocol\ServerToClientHandshakePacket
$LanguageCode : pocketmine\network\mcpe\protocol\types\login\ClientData
$lineHeight : pocketmine\console\ConsoleCommandSender, pocketmine\player\Player
$lookForTargetTime : pocketmine\entity\object\ExperienceOrb
$maxVersionMajor : pocketmine\data\bedrock\block\upgrade\model\BlockStateUpgradeSchemaModel
$maxVersionMinor : pocketmine\data\bedrock\block\upgrade\model\BlockStateUpgradeSchemaModel
$maxVersionPatch : pocketmine\data\bedrock\block\upgrade\model\BlockStateUpgradeSchemaModel
$maxVersionRevision : pocketmine\data\bedrock\block\upgrade\model\BlockStateUpgradeSchemaModel
$MaxViewDistance : pocketmine\network\mcpe\protocol\types\login\ClientData
$mcpe_version : pocketmine\updater\UpdateInfo
$MemoryTier : pocketmine\network\mcpe\protocol\types\login\ClientData
$name : pocketmine\crafting\json\ItemStackData, pocketmine\resourcepacks\json\ManifestHeader
$nbt : pocketmine\network\mcpe\protocol\BlockActorDataPacket, pocketmine\network\mcpe\protocol\StructureTemplateDataResponsePacket, pocketmine\network\mcpe\protocol\UpdateEquipPacket
$new : pocketmine\data\bedrock\block\upgrade\model\BlockStateUpgradeSchemaModelValueRemap
$newFlattenedName : pocketmine\data\bedrock\block\upgrade\model\BlockStateUpgradeSchemaModelBlockRemap
$newName : pocketmine\data\bedrock\block\upgrade\model\BlockStateUpgradeSchemaModelBlockRemap
$offers : pocketmine\network\mcpe\protocol\UpdateTradePacket
$old : pocketmine\data\bedrock\block\upgrade\model\BlockStateUpgradeSchemaModelValueRemap
$output : pocketmine\crafting\json\FurnaceRecipeData, pocketmine\crafting\json\PotionTypeRecipeData, pocketmine\crafting\json\SmithingTransformRecipeData
$output_item_name : pocketmine\crafting\json\PotionContainerChangeRecipeData
$PackId : pocketmine\network\mcpe\protocol\types\login\ClientDataPersonaSkinPiece
$PersonaSkin : pocketmine\network\mcpe\protocol\types\login\ClientData
$php_version : pocketmine\updater\UpdateInfo
$PieceId : pocketmine\network\mcpe\protocol\types\login\ClientDataPersonaSkinPiece
$PieceType : pocketmine\network\mcpe\protocol\types\login\ClientDataPersonaPieceTintColor, pocketmine\network\mcpe\protocol\types\login\ClientDataPersonaSkinPiece
$PlatformOfflineId : pocketmine\network\mcpe\protocol\types\login\ClientData
$PlatformOnlineId : pocketmine\network\mcpe\protocol\types\login\ClientData
$PlatformType : pocketmine\network\mcpe\protocol\types\login\ClientData
$playerActorProperties : pocketmine\network\mcpe\protocol\StartGamePacket
$PlayFabId : pocketmine\network\mcpe\protocol\types\login\ClientData
$prefix : pocketmine\data\bedrock\block\upgrade\model\BlockStateUpgradeSchemaModelFlattenInfo
$PremiumSkin : pocketmine\network\mcpe\protocol\types\login\ClientData
$priority : pocketmine\crafting\json\ShapedRecipeData, pocketmine\crafting\json\ShapelessRecipeData
$ProductId : pocketmine\network\mcpe\protocol\types\login\ClientDataPersonaSkinPiece
$queue : pocketmine\scheduler\TaskScheduler
$removalQueue : pocketmine\world\light\LightPropagationContext
$result : pocketmine\promise\PromiseSharedData
$SelfSignedId : pocketmine\network\mcpe\protocol\types\login\ClientData
$ServerAddress : pocketmine\network\mcpe\protocol\types\login\ClientData
$SkinAnimationData : pocketmine\network\mcpe\protocol\types\login\ClientData
$SkinColor : pocketmine\network\mcpe\protocol\types\login\ClientData
$SkinData : pocketmine\network\mcpe\protocol\types\login\ClientData
$SkinGeometryData : pocketmine\network\mcpe\protocol\types\login\ClientData
$SkinGeometryDataEngineVersion : pocketmine\network\mcpe\protocol\types\login\ClientData
$SkinId : pocketmine\network\mcpe\protocol\types\login\ClientData
$SkinImageHeight : pocketmine\network\mcpe\protocol\types\login\ClientData
$SkinImageWidth : pocketmine\network\mcpe\protocol\types\login\ClientData
$SkinResourcePatch : pocketmine\network\mcpe\protocol\types\login\ClientData
$sound : pocketmine\network\mcpe\protocol\LevelSoundEventPacket
$source_url : pocketmine\updater\UpdateInfo
$spreadQueue : pocketmine\world\light\LightPropagationContext
$suffix : pocketmine\data\bedrock\block\upgrade\model\BlockStateUpgradeSchemaModelFlattenInfo
$SYSTEM_ADDRESS_COUNT : raklib\RakLib
$targetPlayerRuntimeId : pocketmine\entity\object\ExperienceOrb
$template : pocketmine\crafting\json\SmithingTransformRecipeData, pocketmine\crafting\json\SmithingTrimRecipeData
$ThirdPartyName : pocketmine\network\mcpe\protocol\types\login\ClientData
$ThirdPartyNameOnly : pocketmine\network\mcpe\protocol\types\login\ClientData
$TrustedSkin : pocketmine\network\mcpe\protocol\types\login\ClientData
$Type : pocketmine\network\mcpe\protocol\types\login\ClientDataAnimationFrame
$type : pocketmine\resourcepacks\json\ManifestModuleEntry
$UIProfile : pocketmine\network\mcpe\protocol\types\login\ClientData
$uuid : pocketmine\resourcepacks\json\ManifestDependencyEntry, pocketmine\resourcepacks\json\ManifestHeader, pocketmine\resourcepacks\json\ManifestModuleEntry
$validators : pocketmine\inventory\BaseInventory
$x5t : pocketmine\network\mcpe\protocol\types\login\JwtHeader
$x5u : pocketmine\network\mcpe\protocol\types\login\JwtHeader
$XUID : pocketmine\network\mcpe\protocol\types\login\AuthenticationData