From: vrana
Operating system: Windows
PHP version: 5.4.0RC2
Package: Output Control
Bug Type: Bug
Bug description:Output is not discarded when ob_start() callback returns ""
Description:
------------
If ob_start() callback returns an empty string then nothing should be
printed. This is the current behavior in PHP 5.3. Behavior in PHP 5.4 is
different - if a callback returns an empty string then the result is same
as if it wouldn't be called at all - next call is prepended by last call
value.
So there is no way for callback how to discard the output.
Test script:
---------------
ob_start(function ($s) {
fwrite(STDERR, strlen($s) . "\n");
if ($s == "b\n") {
return $s;
}
return "";
}, 2);
echo "a\n";
echo "b\n";
exit;
Expected result:
----------------
2
2
b
0
Actual result:
--------------
2
4
4
--
Edit bug report at https://bugs.php.net/bug.php?id=60468&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=60468&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=60468&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=60468&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=60468&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=60468&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=60468&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=60468&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=60468&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=60468&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=60468&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=60468&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=60468&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=60468&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=60468&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=60468&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=60468&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=60468&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=60468&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=60468&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=60468&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=60468&r=mysqlcfg
