Description
string
gzencode ( string data [, int level [, int encoding_mode]])
This function returns a compressed version of the input
data compatible with the output of the
gzip program, or FALSE if an error is
encountered. The optional parameter level
can be given as 0 for no compression up to 9 for maximum
compression, if not given the default compression level will be
the default compression level of the zlib library.
You can also give FORCE_GZIP (the default)
or FORCE_DEFLATE as optional third parameter
encoding_mode. If you use
FORCE_DEFLATE, you get a standard zlib
deflated string (inclusive zlib headers) after the gzip file
header but without the trailing crc32 checksum.
Note:
level was added in PHP 4.2, before PHP
4.2 gzencode() only had the
data and (optional)
encoding_mode parameters..
The resulting data contains the appropriate headers and data
structure to make a standard .gz file, e.g.:
Example 1. Creating a gzip file |
<?php
$data = implode("", file("bigfile.txt"));
$gzdata = gzencode($data, 9);
$fp = fopen("bigfile.txt.gz", "w");
fwrite($fp, $gzdata);
fclose($fp);
?>
|
|
For more information on the GZIP file format, see the document:
GZIP file format specification
version 4.3 (RFC 1952).
See also gzcompress().
gzuncompress(),
gzdeflate(),
gzinflate().
