Codice PHP:
$filename = "upload/7_file.tar.gz";
print "<html>\n<head></head>\n<body>\n<pre>\n";
$s = "Only a test, test, test, test, test, test, test, test!\n";

// open file for reading
$zp = gzopen($filename, "r");
$compressed = gzread($zp,1000);

$uncompressed = gzuncompress($compressed);
echo $uncompressed;


print "\n";

print "</pre>\n</h1></body>\n</html>\n"; 
Risultato:
Warning: gzuncompress: data error in e:\programmi\apache group\apache\websites\dalla\sito\zip.php on line 11