# zlib_encode

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

zlib_encode — Compress data with the specified encoding

### 说明

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

Compress data with the specified encoding.

警告

本函数还未编写文档，仅有参数列表。

### 参数

`data`

  The data to compress.

`encoding`

  The compression algorithm. Either `ZLIB_ENCODING_RAW`, `ZLIB_ENCODING_DEFLATE` or `ZLIB_ENCODING_GZIP`.

`level`

### 返回值

### 示例

示例 #1 zlib_encode() example

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

以上示例会输出：

    789ccb48cdc9c95728cf2fca4901001a0b045d

### 参见

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

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