# zlib_encode

(PHP 5 >= 5.4.0, PHP 7)

zlib_encode — Compress data with the specified encoding

### 说明

zlib_encode ( string `$data` , int `$encoding` [, int `$level` = -1 ] ) : string

Compress data with the specified encoding.

Warning

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

### 范例

Example #1 zlib_encode() example

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

以上例程会输出：

    789ccb48cdc9c95728cf2fca4901001a0b045d

### 参见

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