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Full Discussion: .bz2 compression
Top Forums UNIX for Dummies Questions & Answers .bz2 compression Post 60550 by Phobos on Tuesday 18th of January 2005 07:05:16 PM
Old 01-18-2005
.bz2 compression

I have heard that bz2 compression a relatively new compression encoding algorithm, far superior to tar and gz. I also remember that I downloaded a FreeBSD LiveCD a while back that was only a couple hundred megs instead of the usual 650ish using bz2 - big difference, I'd say. But to the point, what are the commands to compress/uncompress using bz2 and would I need to download any files to get it to work?

Thanks in advance,
Robert
 

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GZCOMPRESS(3)								 1							     GZCOMPRESS(3)

gzcompress - Compress a string

SYNOPSIS
string gzcompress (string $data, [int $level = -1], [int $encoding = ZLIB_ENCODING_DEFLATE]) DESCRIPTION
This function compresses the given string using the ZLIB data format. For details on the ZLIB compression algorithm see the document "ZLIB Compressed Data Format Specification version 3.3" (RFC 1950). Note This is not the same as gzip compression, which includes some header data. See gzencode(3) for gzip compression. PARAMETERS
o $data - The data to compress. o $level - The level of compression. Can be given as 0 for no compression up to 9 for maximum compression. If -1 is used, the default com- pression of the zlib library is used which is 6. o $encoding - One of ZLIB_ENCODING_* constants. RETURN VALUES
The compressed string or FALSE if an error occurred. EXAMPLES
Example #1 gzcompress(3) example <?php $compressed = gzcompress('Compress me', 9); echo $compressed; ?> CHANGELOG
+--------+-----------------------------+ |Version | | | | | | | Description | | | | +--------+-----------------------------+ | 5.4.0 | | | | | | | Added $encoding parameter. | | | | +--------+-----------------------------+ SEE ALSO
gzdeflate(3), gzinflate(3), gzuncompress(3), gzencode(3). PHP Documentation Group GZCOMPRESS(3)
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