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).
gzdeflate
(PHP 4 >= 4.0.4, PHP 5)
gzdeflate — 文字列を deflate 圧縮する
説明
string gzdeflate
( string $data
[, int $level
] )
この関数は、DEFLATE データフォーマットを用いて 与えられた文字列を圧縮します。
DEFLATE 圧縮アルゴリズムについての詳細は、 "» DEFLATE Compressed Data Format Specification version 1.3" (RFC 1951) を参照ください。
パラメータ
- data
-
収縮させるデータ
- level
-
圧縮レベル。圧縮しない場合に0、最大限の圧縮をする場合に9を指定可能です。 指定しない場合、デフォルトの圧縮レベルは zlib ライブラリのデフォルト圧縮レベルになります。
返り値
収縮された文字列、もしくはエラーの場合 FALSE 。
例
例1 gzdeflate() の例
<?php
$compressed = gzdeflate('Compress me', 9);
echo $compressed;
?>
gzdeflate
tomas at slax dot org
03-Oct-2008 09:13
03-Oct-2008 09:13
romain dot lalaut at laposte dot net
08-Oct-2007 11:20
08-Oct-2007 11:20
@ giunta dot gaetano at sea-aeroportimilano dot it
No, gzdeflate() implements rfc1951.
And rf2616 (http 1.1 specs) says "deflate : The "zlib" format defined in RFC 1950 [31] in combination with the "deflate" compression mechanism described in RFC 1951 [29]."
giunta dot gaetano at sea-aeroportimilano dot it
21-Aug-2006 09:22
21-Aug-2006 09:22
Take care that that "PHP deflate" != "HTTP deflate".
The deflate encoding used in HTTP is actually zlib encoded.
This is what PHP functions return:
gzencode() == gzip
gzcompress() == zlib (aka. HTTP deflate)
gzdeflate() == *raw* deflate encoding
denis dot noessler at red-at dot de
17-Jun-2003 07:26
17-Jun-2003 07:26
if you have compressed data which is greater than 2 MB (system dependent), you will receive a buffer error by calling the function gzinflate().
be sure to to compress your data by a lower compression level, like 1.
i.e.: gzdeflate($sData, 1);