[Phogo]

PHP classes for encoding/decoding data to/from the BitTorrent format, creating torrent files and running your own tracker.

Credits: Christer Edvartsen
Download: here

PHP_BitTorrent

PHP_BitTorrent is a library that provides PHP classes that can be used to encode/decode to/from the BitTorrent format. It also provides tracker classes that can be used to run your own BitTorrent tracker. The package is not a complete tracker system like for instance btit.
Requirements

PHP_BitTorrent requires PHP 5.3.x or above.
Installation

PHP_BitTorrent should be installed using PEAR.
The PEAR channel (pear.starzinger.net) that is used to distribute PHP_BitTorrent needs to be registered with the local PEAR environment.

christer@aurora:~$ sudo pear channel-discover pear.starzinger.net Adding Channel "pear.starzinger.net" succeeded Discovery of channel "pear.starzinger.net" succeeded

This has to be done only once. Now, to install the package:

christer@aurora:~$ sudo pear install stz/PHP_BitTorrent-alpha downloading PHP_BitTorrent-0.0.1.tgz ... Starting to download PHP_BitTorrent-0.0.1.tgz (8,037 bytes) .....done: 8,037 bytes install ok: channel://pear.starzinger.net/PHP_BitTorrent-0.0.1

Using the PHP_BitTorrent API

Encode PHP variables

<?php require_once 'PHP/BitTorrent/Autoload.php';  var_dump(PHP_BitTorrent_Encoder::encodeString('Some string')); // string(14) "11:Some string"  var_dump(PHP_BitTorrent_Encoder::encodeInteger(42)); // string(4) "i42e" var_dump(PHP_BitTorrent_Encoder::encodeList(array(1, 2, 3)); // string(11) "li1ei2ei3ee"  var_dump(PHP_BitTorrent_Encoder::encodeDictionary(array('foo' => 'bar', 'bar' => 'foo')); // string(22) "d3:foo3:bar3:bar3:fooe"

There is also a convenience method simply called encode in the PHP_BitTorrent_Encoder class that can be used to encode all encodable variables. Only integers, strings and arrays can be encoded to the BitTorrent format.
Decode BitTorrent encoded data

<?php require_once 'PHP/BitTorrent/Autoload.php';  var_dump(PHP_BitTorrent_Decoder::decodeString('11:Some string')); // string(11) "Some string"   var_dump(PHP_BitTorrent_Decoder::decodeInteger('i42e')); // int(42) var_dump(PHP_BitTorrent_Decoder::decodeList('li1ei2ei3ee'); // array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) } var_dump(PHP_BitTorrent_Decoder::decodeDictionary('d3:foo3:bar3:bar3:fooe'); // array(2) { ["foo"]=> string(3) "bar" ["bar"]=> string(3) "foo" }

There is also a convenience method called decode that can decode any bittorrent endocded data.
Decode torrent files
The decoder class also has a method for decoding a torrent file (which is an encoded dictionary):

<?php require_once 'PHP/BitTorrent/Autoload.php';  $decodedFile = PHP_BitTorrent_Decoder::decodeFile('/path/to/file.torrent');

Create new torrent files and open existing ones
The PHP_BitTorrent_Torrent class represents a torrent file and can be used to create torrent files.

<?php require_once 'PHP/BitTorrent/Autoload.php';  $torrent = new PHP_BitTorrent_Torrent(); $torrent->setAnnounce('http://tracker/announce.php')         ->setComment('Some comment')         ->loadFromPath('/path/to/files')         ->save('/save/path/file.torrent');

The class can also load a torrent file:

<?php require_once 'PHP/BitTorrent/Autoload.php';  $torrent = new PHP_BitTorrent_Torrent(); $torrent->loadFromTorrentFile('/path/to/file.torrent')         ->setAnnounce('http://tracker/announce.php') // Override announce in original file         ->setComment('Some comment') // Override commend in original file         ->save('/save/path/file.torrent'); // Save to a new file