Most file system functions use gzip to compress files. This module can help transparently read gzip compressed files.
Zlib support is not enabled by default in PHP. Use --with-zlib[=DIR] when you need to install and configure PHP.
The following example opens a temporary file to write a test string, and then prints the file content twice.
Example #1 Simple Zlib example
<?php
$filename = tempnam('/tmp', 'zlibtest') . '.gz';
echo "<html>\n<head></head>\n<body>\n<pre class="brush:php;toolbar:false">\n";
$s = "Only a test, test, test, test, test, test, test, test!\n";
// open file for writing with maximum compression
$zp = gzopen($filename, "w9");
// write string to file
gzwrite($zp, $s);
// close file
gzclose($zp);
// open file for reading
$zp = gzopen($filename, "r");
// read 3 char
echo gzread($zp, 3);
// output until end of the file and close it.
gzpassthru($zp);
gzclose($zp);
echo "\n";
// open file and print content (the 2nd time).
if (readgzfile($filename) != strlen($s)) {
echo "Error with zlib functions!";
}
unlink($filename);
echo "\n