From: matteo at beccati dot com
Operating system: Any
PHP version: 4.3.10
PHP Bug Type: Filesystem function related
Bug description: fread after tmpfile() reads only 8192 bytes
Description:
------------
In recent PHP versions, fread only reads 8192 bytes from a file generated
with tmpfile().
I've already seen bug reports #29023 and #30936 which seem strongly
related to this issue. From what I can see, fread on local files isn't
limited to the PHP chunk size of 8192, while a fread on a tmpfile acts
like it was i.e. a network stream, breaking backwards compatibility. I
found out this issue investigating a recently reported bug for phpAdsNew,
which uses this function to deal with remote ftp-stored files.
IMVHO this can be considered a bug in in the tmpfile() implementation. If
you don't agree, well... I suggest to mark it as a documentation bug,
because I couldn't find nothing related to the 8192 bytes limit in the
manual.
Versions/OS tested and affected:
PHP 4.3.10 Linux
PHP 4.3.11 FreeBSD and Windows
PHP 5.0.4 Windows
Versions/OS tested and unaffected:
PHP 4.3.4 Windows
Reproduce code:
---------------
<?php
$fp = tmpfile();
// This would give the correct result
// $fp = fopen('/tmp/test.dat', 'w+');
fwrite($fp, str_repeat('0', 100000));
$size = ftell($fp);
rewind($fp);
$buf = fread($fp, $size);
echo "Bytes written: ".$size."\n";
echo "Bytes read: ".strlen($buf)."\n";
fclose($fp);
?>
Expected result:
----------------
Bytes written: 100000
Bytes read: 100000
Actual result:
--------------
Bytes written: 100000
Bytes read: 8192
--
Edit bug report at http://bugs.php.net/?id=32810&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=32810&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=32810&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=32810&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=32810&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=32810&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=32810&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=32810&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=32810&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=32810&r=support
Expected behavior: http://bugs.php.net/fix.php?id=32810&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=32810&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=32810&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=32810&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=32810&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=32810&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=32810&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=32810&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=32810&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=32810&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=32810&r=mysqlcfg
