gzputs
I don't think it would be wise to open a whole gzip file (it _is_ compressed for a reason, and likely to be a very big file) into a single string. You would most likely hit the php memory limits. Instead, if you need to process the file, put your gzread calls in a loop, and read incrementally by a setting $length to a constant value.
gzread
(PHP 4, PHP 5)
gzread — Binary-safe gz-file read
Description
string gzread
( resource $zp
, int $length
)
gzread() reads up to length bytes from the given gz-file pointer. Reading stops when length (uncompressed) bytes have been read or EOF is reached, whichever comes first.
Parameters
- zp
-
The gz-file pointer. It must be valid, and must point to a file successfully opened by gzopen().
- length
-
The number of bytes to read.
Return Values
The data that have been read.
Examples
Example #1 gzread() example
<?php
// get contents of a gz-file into a string
$filename = "/usr/local/something.txt.gz";
$zd = gzopen($filename, "r");
$contents = gzread($zd, 10000);
gzclose($zd);
?>
add a note
User Contributed Notesgzread
utku
08-Feb-2008 10:31
08-Feb-2008 10:31
zaotong at yahoo dot com
08-Mar-2007 12:06
08-Mar-2007 12:06
As was shown to me in another forum there is a way to get the uncompressed size of the gz file by viewing the last 4 bytes of the gz file.
Here is a piece of code that will do this
<?php
$FileRead = 'SomeText.txt';
$FileOpen = fopen($FileRead, "rb");
fseek($FileOpen, -4, SEEK_END);
$buf = fread($FileOpen, 4);
$GZFileSize = end(unpack("V", $buf));
fclose($FileOpen);
$HandleRead = gzopen($FileRead, "rb");
$ContentRead = gzread($HandleRead, $GZFileSize);
?>
This will read the last 4 bytes of the gz file and use it as the file int for the gzread.
Thanks to stereofrog for helping me with this code.
methatron at hotmail dot com
27-Sep-2006 09:33
27-Sep-2006 09:33
Be aware that gzread's second parameter - length reffers to the file's uncompressed size, therefore using this code:
<?php
$file_name = "/usr/local/something.txt.gz";
if($file_handle = gzopen($file_name, "r"))
{
$contents = gzread($file_handle, filesize($file_name));
gzclose($file_name);
}
?>
will probably truncate the content of the file as filesize checks for the file's compressed size.
So either use the actual uncompressed size, if you know it, or use an aribtrary big enough length, as gzreading will stop at the end of the file anyway.