Description:
------------
It seems bzread reads only the 1st block of that specific archive.

The archive size is:
ls -l test.bz2 
-rw-r--r-- 1 1000 users 2082194364 Oct  1 07:21 test.bz2

I can extract the archive just fine with system bzip2.

Test script:
---------------
<?php
$filename = 'test.bz2';
$uncompressed = '';
$fp = bzopen($filename, 'r');
if (!$fp)
die("Could not open $filename\n");
$size = 0;
while (!feof($fp)) {
$buf = bzread($fp, 4096);
$size+= strlen($buf);
if ($buf === false)
die("File read problem\n");
$arr = bzerror($fp);
if ($arr['errno'] !== 0)
die("Compression problem ".$arr['errstr']."\n");
}
var_dump($size);
bzclose($fp);

Expected result:
----------------
int(2082194364)

Actual result:
--------------
int(900000)