ID:               32508
 Updated by:       [EMAIL PROTECTED]
 Reported By:      myronwu at gmail dot com
-Status:           Open
+Status:           Feedback
 Bug Type:         Output Control
 Operating System: Linux 2.4
 PHP Version:      5.0.3
 New Comment:

You can always make the chunk size smaller than 2048?
Or doesn't this problem occur then?



Previous Comments:
------------------------------------------------------------------------

[2005-03-31 08:33:29] myronwu at gmail dot com

Sorry, it's my sysadmin that set up those 
configure variables....

Anyway, we used phpinfo() for example code because it 
outputs something larger than the example chunk size I 
was using of 2048 bytes.  I could manually write out 
more than 2048, but that probably wouldn't be as concise 
for bug reporting.

The problem we have specifically arises when the 
ob_gzhandler attempts to send out chunks.

------------------------------------------------------------------------

[2005-03-31 08:20:56] [EMAIL PROTECTED]

Does it only happen when you have phpinfo() in there?
(I'd put something else between there..)

Also, try doing ./configure --help sometimes. You have several options
used that don't even exist. Like --enable-track-vars, --with-apache2..


------------------------------------------------------------------------

[2005-03-31 02:15:34] myronwu at gmail dot com

Reconfirmed the bug using the reproduce code on CVS snapshot
php5-STABLE-200503302230, configure command:

'./configure' '--with-mysqli=/usr/local/mysql/bin/mysql_config'
'--with-mysql=/usr/local/mysql'
'--with-apache2=/usr/src/apache/httpd-2.0.53' '--enable-yp'
'--enable-track-vars' '--with-zlib' '--with-jpeg' '--with-png'
'--with-tiff' '--with-pdflib' '--with-gd'
'--with-apxs2=/var/www/bin/apxs' '--with-gettext' '--with-pspell'

Otherwise same setup as reported above.

------------------------------------------------------------------------

[2005-03-30 22:44:12] [EMAIL PROTECTED]

Please try using this CVS snapshot:

  http://snaps.php.net/php5-STABLE-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5.0-win32-latest.zip



------------------------------------------------------------------------

[2005-03-30 22:38:41] myronwu at gmail dot com

Description:
------------
In certain browsers, attempting to output data before a 
call to ob_start('ob_gzhandler', chunk_size) causes 
Apache 2 to consume huge (all) amounts of memory.  This 
only occurs when chunking takes place (ie size of data 
output > chunk_size).

Outputting data before a call to ob_start without a 
chunk_size or without 'ob_gzhandler' works as expected.

Browsers tested that were affected:  Firefox, Opera
Browsers tested that were unaffected:  Links

Diff between php.ini and php.ini-dist:
register_globals = On

Apache version:
Apache/2.0.53 (Unix) mod_ssl/2.0.53 OpenSSL/0.9.7a PHP/
5.0.3

using prefork mpm.

Zlib version: 1.1.4

PHP configure command:

'./configure' '--with-mysqli=/usr/local/mysql/bin/
mysql_config' '--with-mysql=/usr/local/mysql' '--with-
apache2=/usr/src/apache/httpd-2.0.53' '--enable-yp' '--
enable-track-vars' '--with-zlib' '--with-jpeg' '--with-
png' '--with-tiff' '--with-pdflib' '--with-gd' '--with-
apxs2=/var/www/bin/apxs' '--with-gettext' '--with-
pspell'

This was also reproduced on another box with the same 
versions of Apache 2, zlib, but PHP 4.3.1 with configure 
command:

'./configure' '--with-mysql=/usr/local/mysql' '--with-
apache2=/usr/src/httpd-2.0.46' '--enable-yp' '--enable-
track-vars' '--with-zlib-dir=/usr/local/lib' '--with-
jpeg-dir=/usr/local/lib' '--with-png-dir=/usr/local/lib' 
'--with-tiff-dir=/usr/local/lib' '--with-pdflib' '--
with-gd=yes' '--with-apxs2=/var/www/bin/apxs'

Reproduce code:
---------------
<?php

echo 'test!';
ob_start('ob_gzhandler', 2048);
phpinfo();
ob_end_flush();

?>

Expected result:
----------------
test! (phpinfo() output)

Actual result:
--------------
Nothing.  The browser doesn't receive any information to 
display and httpd begins to consume all available 
memory.


------------------------------------------------------------------------


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