gzencode()

gzencode

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

gzencode — Create a gzip compressed string

Description

gzencode(string $data, int $level = -1, int $encoding = ZLIB_ENCODING_GZIP): string|false This function returns a compressed version of the input data compatible with the output of the gzip program.

For more information on the GZIP file format, see the document: » GZIP file format specification version 4.3 (RFC 1952).

Parameters

data: The data to encode.

level: The level of compression. 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.

encoding: The encoding mode. Can be `FORCE_GZIP` (the default) or `FORCE_DEFLATE`.

`FORCE_DEFLATE` generates RFC 1950 compliant output, consisting of a zlib header, the deflated data, and an Adler checksum.

Return Values

The encoded string, or false if an error occurred.

Examples

Example #1 Creating a gzip file

$data = file_get_contents("bigfile.txt");
$gzdata = gzencode($data, 9);
file_put_contents("bigfile.txt.gz", $gzdata);

See Also

• gzdecode() - Decodes a gzip compressed string
• gzdeflate() - Deflate a string
• gzinflate() - Inflate a deflated string
• gzuncompress() - Uncompress a compressed string
• gzcompress() - Compress a string
• » ZLIB Compressed Data Format Specification (RFC 1950)

gzencode

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

gzencode — Create a gzip compressed string

Description

gzencode(string $data, int $level = -1, int $encoding = ZLIB_ENCODING_GZIP): string|false This function returns a compressed version of the input data compatible with the output of the gzip program.

For more information on the GZIP file format, see the document: » GZIP file format specification version 4.3 (RFC 1952).

Parameters

data: The data to encode.

level: The level of compression. 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.

encoding: The encoding mode. Can be `FORCE_GZIP` (the default) or `FORCE_DEFLATE`.

`FORCE_DEFLATE` generates RFC 1950 compliant output, consisting of a zlib header, the deflated data, and an Adler checksum.

Return Values

The encoded string, or false if an error occurred.

Examples

Example #1 Creating a gzip file

$data = file_get_contents("bigfile.txt");
$gzdata = gzencode($data, 9);
file_put_contents("bigfile.txt.gz", $gzdata);

See Also

• gzdecode() - Decodes a gzip compressed string
• gzdeflate() - Deflate a string
• gzinflate() - Inflate a deflated string
• gzuncompress() - Uncompress a compressed string
• gzcompress() - Compress a string
• » ZLIB Compressed Data Format Specification (RFC 1950)

Sidslut

Orginalhemsidan på Engelska :https://www.php.net/manual/en/function.gzencode.php
PHP Funktioner Funktionsreferens Komprimerings- och arkivtillägg Zlib — Zlib Komprimering

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