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zlib_encode

(PHP 5 >= 5.4.0, PHP 7, PHP 8)

zlib_encode — Compress data with the specified encoding

Description

function zlib_encode(string $data, int $encoding, int $level = -1): string|false

Compress data with the specified encoding.

Warning

This function is currently not documented; only its argument list is available.

Parameters

data: The data to compress.
encoding: The compression algorithm. Either ZLIB_ENCODING_RAW, ZLIB_ENCODING_DEFLATE or ZLIB_ENCODING_GZIP.
level

Return Values

Examples

Example #1 zlib_encode() example

<?php
$str = 'hello world';
$enc = zlib_encode($str, ZLIB_ENCODING_DEFLATE);
echo bin2hex($enc);
?>

The above example will output:

789ccb48cdc9c95728cf2fca4901001a0b045d

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User Contributed Notes 1 note

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geniuszxy at outlook dot com ¶

3 years ago

zlib_encode, gzcompress, gzdeflate and gzencode are the same functions besides the parameter order.

zlib_encode + ZLIB_ENCODING_RAW = gzdeflate
zlib_encode + ZLIB_ENCODING_DEFLATE = gzcompress
zlib_encode + ZLIB_ENCODING_GZIP = gzencode