zlib_encode
(PHP 5 >= 5.4.0)
zlib_encode — Compress data with the specified encoding
说明
$data
, string $encoding
[, string $level = -1
] )Compress data with the specified encoding.
本函数还未编写文档，仅有参数列表。
参数
-
data -
-
encoding -
-
level -
返回值
参见
- zlib_decode() - Uncompress any raw/gzip/zlib encoded data
用户评论:
[#1] mike at technomonk.com [2014-04-23 13:28:08]
Undocumented constants are:
ZLIB_ENCODING_RAW
ZLIB_ENCODING_GZIP
ZLIB_ENCODING_DEFLATE
Example code:
<?php
$in='hello world';
$enc=zlib_encode($in, ZLIB_ENCODING_DEFLATE);
echo zlib_decode($enc);
//outputs 'hello world'
?>
[#2] soywiz at gmail dot com [2012-09-20 20:12:39]
RFC 1950 - zlib
RFC 1951 - raw deflate
RFC 1952 - gzip
The $encoding parameter referers to the window bits. So you can encode in several formats:
<?php
// RFC 1950 - zlib
$compressedData = zlib_encode($uncompressedData, 15);
// RFC 1951 - raw deflate
$compressedData = zlib_encode($uncompressedData, -15);
// RFC 1952 - gzip
$compressedData = zlib_encode($uncompressedData, 31);
?>