Nu-Coder Manual

PhpExpress Manual

PHP Joomla
Development

zlib_decode	zlib_get_coding_type

Zlib Functions	Last updated: Mon, 26 Oct 2026

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

See Also

zlib_decode() - Uncompress any raw/gzip/zlib encoded data

zlib_decode	zlib_get_coding_type

Zlib Functions	Last updated: Mon, 26 Oct 2026