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PHP Manual :: gzcompress



gzclose || gzdecode || Zlib Functions || PHP Manual

(PHP 4 >= 4.0.1, PHP 5, PHP 7)

gzcompressCompress a string

Description

string gzcompress ( string $data [, int $level = -1 [, int $encoding = ZLIB_ENCODING_DEFLATE ]] )

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() for gzip compression.

Parameters

data

The data to compress.

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 compression of the zlib library is used which is 6.

encoding

One of ZLIB_ENCODING_* constants.

Return Values

The compressed string or FALSE if an error occurred.

Examples

Example #1 gzcompress() example

<?php
$compressed 
gzcompress('Compress me'9);
echo 
$compressed;
?>

Changelog

Version Description
5.4.0 Added encoding parameter.

See Also



gzclose || gzdecode || Zlib Functions || PHP Manual
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