LZW
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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.
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.
| Classes of Sam Shull | > | LZW | > | Download .zip .tar.gz | > |  Support forum (1) |
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Algorithms | Numerical and statistical algorithms | View top rated classes |
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Compression | Data compression and file archive manipulation | View top rated classes |
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 August 2007 Number 7 Prize: One license of PHPEdit Professional |
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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| Link | Description |
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| LZW Unisys Patent Information | The LZW Patent is expired, here is proof from Unisys themselves. |
| Wikipedia Description of LZW | Wikipedia Description of LZW |
| Download all files: lzwc.tar.gz lzwc.zip |
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