Parse, Edit And Create Torrent Files With PHP
A .torrent file contains assorted metadata that is stored in a “bencoded dictionary” format. Bencoding is a relatively simple cross-platform encoding used by BitTorrent and a dictionary is basically an associative array. You can find a high-level overview of the file structure here.
To open or edit a .torrent file in PHP you can either parse it manually or use one of the wrapper classes available on the web. I recommend the Torrent RW class (local mirror) because it has the best feature set compared to other wrappers that I tested. Below you will find a short overview of the class and a few example scripts that demonstrate how you can analyze .torrent files and create new torrents using this wrapper.
Pros
- Simple class interface for all important metadata.
- Parse and edit existing torrent files or build new torrent files from scratch.
- Request torrent statistics from tracker(s).
- Good inline documentation.
Cons
Note : these apply to the current version and bugs may be fixed in future releases.
- When encoding the torrent to a string, tries to
ksort()
an object. This can trigger a warning message whenever outputting or saving a torrent file. Note that I’ve fixed this bug in the “local mirror” version, above. allow_url_fopen
must be enabled to get stats from trackers. This is generally considered bad practice security-wise.- The script requires PHP 5. This is not a major problem, just worth knowing if you want to incorporate TorrentRW in your own scripts and distribute them.
Examples
require_once 'Torrent.php'; /*********************** Get torrent info ***********************/ $torrent = new Torrent( './test.torrent' ); echo "<pre>\nPrivate: ", $torrent->is_private() ? 'yes' : 'no', "\nAnnounce: ", $torrent->announce(), "\nName: ", $torrent->name(), "\nComment: ", $torrent->comment(), "\nPiece_length: ", $torrent->piece_length(), "\nSize: ", $torrent->size( 2 ), "\nHash info: ", $torrent->hash_info(), "\nStats: "; var_dump( $torrent->scrape() ); echo "\nContents: "; var_dump( $torrent->content() ); //echo "\nSource data: ", $torrent; /*********************** Create a new torrent ***********************/ $torrent = new Torrent( array( 'test.mp3', 'test.jpg' ), 'http://torrent.tracker/announce' ); //Send it to the browser $torrent->send(); //Alternatively, you can also save it as a new file file_put_contents('new.torrent', (string) $torrent);Related posts :
Thank you for shining a light on this. I’ve been using a very rudimentary torrent parser until now.
Hi I have tried the above html and php file but all i get is the entire information just printed to my browser so for example instead of
Piece_length: 5
i just get
“\nPiece_length: “, $torrent->piece_length()
im fairly new to php so probably something im doing wrong. Any help thanks
how to implement this?
What is the particular Wp template you used on this web page?
You know where I might find a comparable looking design for my personal website as well?
Thank you so much!
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