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Package nbt
Short Description PHP library to parse, modify, and create NBT objects
License MIT
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Informations about the package nbt
php-nbt
A full PHP implementation of Minecraft's Named Binary Tag (NBT) format.
In contrast to other implementations, this library provides full support
for 64-bit types, including the relatively new TAG_Long_Array.
Additionally, all three flavors (Java Edition, Bedrock Edition/little endian, and Bedrock Edition/VarInt) of the NBT format are supported.
Installation
Usage
Reading NBT data
To read existing NBT data, a Reader object is required. This library implements different readers to read NBT data from strings.
Note that the reader object is also used to specify the NBT format flavor.
Available are \Aternos\Nbt\NbtFormat::JAVA_EDITION, \Aternos\Nbt\NbtFormat::BEDROCK_EDITION, and \Aternos\Nbt\NbtFormat::BEDROCK_EDITION_NETWORK.
More advanced readers can be created by implementing the \Aternos\Nbt\IO\Reader\Reader interface or by extending the \Aternos\Nbt\IO\Reader\AbstractReader class.
A reader object can be used to load the NBT tag.
In theory, any type of NBT tag could be returned, but in reality all NBT files will start with either a compound tag or a list tag.
Manipulating NBT structures
Tag values of type TAG_Byte, TAG_Short, TAG_Int, TAG_Long, TAG_Float,
TAG_Double, TAG_String can be accessed via their getValue() and setValue() functions.
On String tags, getValue() and setValue() use the UTF-8 encoding and convert strings based on the selected NBT flavor
when being serialized.
Compound tags, list tags, and array tags implement the ArrayAccess, Countable,
and Iterator interfaces and can therefore be accessed as arrays.
Alternatively, compound tags can be accessed using getter/setter functions. This is especially useful in combination with the new PHP null safe operator.
Serializing NBT structures
Similar to the reader object to read NBT data, a writer object is required to write NBT data.
The NBT flavor used by a writer object can differ from the one used by the reader object that was originally used to read the NBT structure. It is therefore possible to use this library to convert NBT structures between the different formats.
More advanced writers can be created by implementing the \Aternos\Nbt\IO\Writer\Writer interface or by extending the \Aternos\Nbt\IO\Writer\AbstractWriter class.
A writer object can be used to write/serialize an NBT structure.
Bedrock Edition level.dat
While the Bedrock Edition level.dat file is an uncompressed NBT file, its NBT data is prepended by two 32-bit little endian integers.
The first one seems to be the version of the Bedrock Edition Storage Tool,
which is also stored in the StorageVersion tag of the NBT structure.
The second number is the size of the file's NBT structure (not including the two prepending integers).
A Bedrock Edition level.dat file could be read like this:
All versions of nbt with dependencies
php Version >=8.1
php-64bit Version *
ext-zlib Version *
ext-json Version *
ext-mbstring Version *