(PHP 4 >= 4.0.4, PHP 5, PHP 7)
bzread — Binary safe bzip2 file read
$bz
[, int $length = 1024
] )bzread() reads from the given bzip2 file pointer.
Reading stops when length (uncompressed) bytes have
been read or EOF is reached, whichever comes first.
bzThe file pointer. It must be valid and must point to a file successfully opened by bzopen().
lengthIf not specified, bzread() will read 1024 (uncompressed) bytes at a time. A maximum of 8192 uncompressed bytes will be read at a time.
Returns the uncompressed data, or FALSE on error.
Example #1 bzread() example
<?php
$file = "/tmp/foo.bz2";
$bz = bzopen($file, "r") or die("Couldn't open $file");
$decompressed_file = '';
while (!feof($bz)) {
$decompressed_file .= bzread($bz, 4096);
}
bzclose($bz);
echo "The contents of $file are: <br />\n";
echo $decompressed_file;
?>
Make sure you check for bzerror while looping through a bzfile. bzread will not detect a compression error and can continue forever even at the cost of 100% cpu.
$fh = bzopen('file.bz2','r');
while(!feof($fh)) {
$buffer = bzread($fh);
if($buffer === FALSE) die('Read problem');
if(bzerror($fh) !== 0) die('Compression Problem');
}
bzclose($fh);
The earlier posted code has a small bug in it: it uses bzerror instead of bzerrno. Should be like this:
$fh = bzopen('file.bz2','r');
while(!feof($fh)) {
$buffer = bzread($fh);
if($buffer === FALSE) die('Read problem');
if(bzerrno($fh) !== 0) die('Compression Problem');
}
bzclose($fh);
