gzinflate
WARNING gzopen and gzread have a major disadvantage. They makes NO checksum and NO length verification of the gzipped data and discard this valuable information. This should be documented here.
gzopen
(PHP 4, PHP 5)
gzopen — Open gz-file
Descrizione
resource gzopen
( string $filename
, string $mode
[, int $use_include_path
] )
Opens a gzip (.gz) file for reading or writing.
gzopen() can be used to read a file which is not in gzip format; in this case gzread() will directly read from the file without decompression.
Elenco dei parametri
- filename
-
The file name.
- mode
-
As in fopen() (rb or wb) but can also include a compression level (wb9) or a strategy: f for filtered data as in wb6f, h for Huffman only compression as in wb1h. (See the description of deflateInit2 in zlib.h for more information about the strategy parameter.)
- use_include_path
-
You can set this optional parameter to 1, if you want to search for the file in the include_path too.
Valori restituiti
Returns a file pointer to the file opened, after that, everything you read from this file descriptor will be transparently decompressed and what you write gets compressed.
If the open fails, the function returns FALSE.
Esempi
Example #1 gzopen() Example
<?php
$fp = gzopen("/tmp/file.gz", "r");
?>
add a note
User Contributed Notesgzopen
katzlbtjunk at hotmail dot com
23-Apr-2008 12:15
23-Apr-2008 12:15
rob at digital-crocus dot com
01-Jun-2005 05:28
01-Jun-2005 05:28
dtorop932 at hotmail dot com's comments, according to my tests, is incorrect. That code wishes to download the entire file before parsing, which is inconvinient. The wget method works though.
pentek_imre at mailbox dot hu
29-Jan-2005 10:36
29-Jan-2005 10:36
Be aware that when opening a remote file on a http server the gzopen will return by default false after 120 seconds waiting to any answer.
dtorop932 at hotmail dot com
21-Oct-2004 12:04
21-Oct-2004 12:04
RE dubious's comment: "Being able to read gzip streams from ftp and http is near the top of my personal wishlist at the moment..."
One way to read a gzip stream over http is to daisychain stream wrappers, e.g.:
<?
$fp = fopen("compress.zlib://http://some.website.org/example.gz", "r");
?>
-delete-this-part-dubious at 2xtreme dot net
02-Jan-2002 07:22
02-Jan-2002 07:22
"On the fly" gunzipping actually DOES seem to work - it just appears that only LOCAL streams/files (including php://stdin) can be accessed for some reason. I THINK (but have not yet tested) that you could similarly gzopen "php://stdout" and pass a stream of gzipped data to the browser (when run from a web page) or console (when run standalone) through there.
I HAVE tested scripts from the command line like:
wget -q -O- ftp://some.host.net/pub/some_gzip_file.gz | php gunzip_stuff.php
where gunzip_stuff.php would be a script that gzopened "php://stdin" and did gzgets from that stream, and it seems to work fine, but that obviously doesn't help someone wanting to grab gzipped streams from remote sites from a web-based script.
Being able to read gzip streams from ftp and http is near the top of my personal wishlist at the moment...