From: [EMAIL PROTECTED]
Operating system: Windows XP Pro / UNIX
PHP version: 4.2.2
PHP Bug Type: Filesystem function related
Bug description: succesive fgets() and fwrite() calls
Now here is a script that i've written to show my bug: (sorry it's so long,
but this way the output is clear :)
<?
$tempfile="temp.txt";
if(!$fp= fopen($tempfile, "r+")) {
echo "Opening file failed.\n";
} else {
echo "\nReading original file..\n";
$line=fgets($fp, 4096);
echo "reading $tempfile: \"$line\"..\n";
$line2=fgets($fp, 4096);
echo "reading $tempfile: \"$line2\"..\n";
echo "\nWorking with \$line2\n";
$line2=explode(" ", $line2);
$line2[1]++;
$line2=implode(" ", $line2);
rewind($fp);
echo "\nRewinding $fp..\n";
$line = fgets($fp, 4096);
echo "skipping the first line..\n";
fwrite($fp, $line2);
echo "writing $tempfile: \"$line2\"..\n";
rewind($fp);
echo "\nRewinding $fp..\n";
echo "\nOutputing file again..\n";
$line=fgets($fp, 4096);
echo "reading $tempfile: \"$line\"..\n";
$line2=fgets($fp, 4096);
echo "reading $tempfile: \"$line2\"..\n";
fclose($fp);
}
?>
temp.txt would look like this:
a 1
c 5
without a trailing \n after the 5.
Now what should happen is that the 5 should be incremented to 6 and get
written back to the file. Under *nix this works fine, but under a windows
version (sofar all that i've tried) it does not, the file is unchanged. My
home platform is the Zend Development Enviroment (2.6), which runs PHP
4.2.2 or higher, under Windows XP Professional. As i mentioned earlier,
under my system the file will be unchanged, but if i upload the same thing
to a UNIX server, it will perform as expected and change "c 5" to "c 6".
If there's no fgets() call before the fwrite(), it will work, however
(although that defeats the purpose of PHP, i'd like to be able to randomly
access a file :D ).
--
Edit bug report at http://bugs.php.net/?id=22124&edit=1
--
Try a CVS snapshot: http://bugs.php.net/fix.php?id=22124&r=trysnapshot
Fixed in CVS: http://bugs.php.net/fix.php?id=22124&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=22124&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=22124&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=22124&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=22124&r=support
Expected behavior: http://bugs.php.net/fix.php?id=22124&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=22124&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=22124&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=22124&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=22124&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=22124&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=22124&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=22124&r=gnused
