From: sviver at vnet dot hu
Operating system: Windows XP prof.
PHP version: 5.1.4
PHP Bug Type: Filesystem function related
Bug description: fread() strange behaviour
Description:
------------
I open a file of about 600kb, then loop over it with feof and fread, and
echo the read data to the output. In a previous php version (>5, <5.1.4)
it returned random characters, but the file size was correct. So I
upgraded to 5.1.4 to see whether the problem is still there. With the new
version there are no random characters, but the result is much smaller
than the original file. Sometimes it's 73728 (=72*1024) bytes, somtimes
24576 (=24*1024), sometimes 98304 (also divisible), sometimes 81920 (also
divisible). Etc. The previous version also started producing strange
output after reading several block correctly - the new version simply
stops reading.
With the previous version the problem disappered if I set the block size
to 1*1028. With the new version it persists. There is no error message at
the end of the file.
Reproduce code:
---------------
<?php
$filename='../data/temp/temp_output/5741921624893711';
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="test.file"');
$packet = 4*1024;
$buff = '';
$F = fopen($filename, 'rb');
while (!feof($F)) {
$buff = fread($F, $packet);
echo $buff;
}
fclose($F);
?>
Expected result:
----------------
The complete file as a download.
Actual result:
--------------
Part of the file.
--
Edit bug report at http://bugs.php.net/?id=37939&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=37939&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=37939&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=37939&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=37939&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=37939&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=37939&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=37939&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=37939&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=37939&r=support
Expected behavior: http://bugs.php.net/fix.php?id=37939&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=37939&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=37939&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=37939&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=37939&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=37939&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=37939&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=37939&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=37939&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=37939&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=37939&r=mysqlcfg
