gzdecode
gzcompress produces longer data because it embeds information about the encoding onto the string. If you are compressing data that will only ever be handled on one machine, then you don't need to worry about which of these functions you use. However, if you are passing data compressed with these functions to a different machine you should use gzcompress.
gzdeflate
(PHP 4 >= 4.0.4, PHP 5)
gzdeflate — Deflate a string
설명
string gzdeflate
( string $data
[, int $level= -1
] )
This function compress the given string using the DEFLATE data format.
For details on the DEFLATE compression algorithm see the document "» DEFLATE Compressed Data Format Specification version 1.3" (RFC 1951).
인수
- data
-
The data to deflate.
- level
-
The level of compression. Can be given as 0 for no compression up to 9 for maximum compression. If not given, the default compression level will be the default compression level of the zlib library.
반환값
The deflated string or FALSE if an error occurred.
예제
Example #1 gzdeflate() example
<?php
$compressed = gzdeflate('Compress me', 9);
echo $compressed;
?>
참고
- gzinflate() - Inflate a deflated string
- gzcompress() - Compress a string
- gzuncompress() - Uncompress a compressed string
- gzencode() - Create a gzip compressed string
add a note
User Contributed Notesgzdeflate
anonymous at php dot net
05-Jun-2009 09:20
05-Jun-2009 09:20
tomas at slax dot org
03-Oct-2008 09:13
03-Oct-2008 09:13
gzcompress() is the same like gzdefflate(), it produces identical data and its speed is the same as well. The only difference is that gzcompress produces 6 bytes bigger result (2 extra bytes at the beginning and 4 extra bytes at the end).
romain dot lalaut at laposte dot net
08-Oct-2007 11:20
08-Oct-2007 11:20
@ giunta dot gaetano at sea-aeroportimilano dot it
No, gzdeflate() implements rfc1951.
And rf2616 (http 1.1 specs) says "deflate : The "zlib" format defined in RFC 1950 [31] in combination with the "deflate" compression mechanism described in RFC 1951 [29]."
giunta dot gaetano at sea-aeroportimilano dot it
21-Aug-2006 09:22
21-Aug-2006 09:22
Take care that that "PHP deflate" != "HTTP deflate".
The deflate encoding used in HTTP is actually zlib encoded.
This is what PHP functions return:
gzencode() == gzip
gzcompress() == zlib (aka. HTTP deflate)
gzdeflate() == *raw* deflate encoding
denis dot noessler at red-at dot de
17-Jun-2003 07:26
17-Jun-2003 07:26
if you have compressed data which is greater than 2 MB (system dependent), you will receive a buffer error by calling the function gzinflate().
be sure to to compress your data by a lower compression level, like 1.
i.e.: gzdeflate($sData, 1);