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Class: LZW

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  Classes of Sam Shull  >  LZW  >  Download .tar.gz .zip  >  Support forum Support forum (1)  >  Blog Blog  >  RSS 1.0 feed RSS 2.0 feed Latest changes  
Name: LZW
Support forum Support forum
Base name: lzwc
Description: Compress and uncompress data with LZW algorithm
Related classes: , , , , , , ,
Version: -
PHP version: 4.0
License: BSD License
All time users: 1285 users
All time rank: 2476
Week users: 3 users
Week rank: 1216
Picture of Sam Shull
Author: Sam Shull is available for providing paid consulting. Contact Sam Shull .
Packages: 9 Browse this author's classes Browse this author's classes
Country: United States United States - PHP jobs in United States
Age: 35
All time rank: 40744 in United States United States
Week rank: 519 Down58 in United States United States Down
Innovation award
Innovation award
Nominee: 8x


  Detailed description  
This class can be used to compress and uncompress data with the LZW algorithm in pure PHP code.

It can take a string of data and compress it with the LZW algorithm. It can also do the opposite, i.e. extract the original data from compressed string using the same algorithm.

 

  Groups  
Group folder image Algorithms Numerical and statistical algorithms View top rated classes
Group folder image Compression Data compression and file archive manipulation View top rated classes

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  Innovation Award  
PHP Programming Innovation award nominee
August 2007
Number 7
 LZW (Lempel-Ziv-Welch) is a compression algorithm made popular for its use in the formats GIF, TIFF and PDF.

This class can be used to compress and decompress data that uses LZW algorithm in pure PHP.

It makes possible to encode and decode image and documents that employ this algorithm using only pure PHP code, thus without any special PHP extensions.

Manuel Lemos

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  Related links  
Link Description
LZW Unisys Patent Information The LZW Patent is expired, here is proof from Unisys themselves.
Wikipedia Description of LZW Wikipedia Description of LZW

  Files folder image Files  
File Role Description
Accessible without login Plain text file lzwc.php Class The compression class
Plain text file example Example A simple example of the use of this class

Download all files: lzwc.tar.gz lzwc.zip
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