[PHP-BUG] Bug #62627 [NEW]: Zlib output handler enabled randomly

[roctom at gmail dot com]

From:             roctom at gmail dot com
Operating system: Debian 2.6.32-5-xen-amd64 
PHP version:      5.4.5
Package:          *Compression related
Bug Type:         Bug
Bug description:Zlib output handler enabled randomly

Description:
------------
Having upgraded from 5.4.0 to 5.4.5, I now get the zlib output compression
handler 
as part of ob_list_handlers() randomly which generates issues with
ob_start().

zlib.output_compression is set to off.

'./configure' '--sysconfdir=/etc' '--with-config-file-path=/etc'
'--with-config-
file-scan-dir=/etc/php.d' '--with-apxs2=/usr/sbin/apxs' '--with-openssl'
'--with-
gd' '--with-curl=/usr/src/curl-7.21.7/include' '--with-zlib'
'--enable-calendar' 
'--enable-mbstring' '--enable-zip' '--enable-sockets' '--with-mcrypt'
'--with-
mysql=mysqlnd' '--with-mysqli=mysqlnd' '--with-pdo-mysql=mysqlnd' '--with-
kerberos' '--enable-ftp' '--disable-posix' '--enable-bcmath'
'--enable-gd-native-
ttf' '--with-freetype-dir' '--with-jpeg-dir=/usr/local' '--with-png-
dir=/usr/local' '--with-xsl=/usr/local/lib' '--enable-exif'

Test script:
---------------
<?php
//using output_buffering=On
print_r(ob_list_handlers());
ob_end_flush();

ob_start("ob_gzhandler");
print_r(ob_list_handlers());
ob_end_flush();

// anonymous functions
ob_start(create_function('$string', 'return $string;'));
print_r(ob_list_handlers());
ob_end_flush();

Expected result:
----------------
Array
(
    [0] => default output handler
)

Array
(
    [0] => ob_gzhandler
)

Array
(
    [0] => default output handler
)

Actual result:
--------------
First execution (in browser)
Array
(
    [0] => default output handler
)
Array
(
    [0] => ob_gzhandler
)
Array
(
    [0] => 
)

Second execution (in browser)
Firefox 16.1a
Array
(
    [0] => default output handler
    [1] => zlib output compression
)


Chrome 2.0.1132.57
Array
(
    [0] => default output handler
    [1] => zlib output compression
)
‹s,*J¬äÒàR‚hƒX[;…”Ô´ÄÒœ…üÒ’‚Ò…ŒÄ¼”œÔ"ˆ
C°Šü¤øô*˜¸&HùÓàDArray
(
    [0] => default output handler
    [1] => 
)

-- 
Edit bug report at https://bugs.php.net/bug.php?id=62627&edit=1
-- 
Try a snapshot (PHP 5.4):            
https://bugs.php.net/fix.php?id=62627&r=trysnapshot54
Try a snapshot (PHP 5.3):            
https://bugs.php.net/fix.php?id=62627&r=trysnapshot53
Try a snapshot (trunk):              
https://bugs.php.net/fix.php?id=62627&r=trysnapshottrunk
Fixed in SVN:                        
https://bugs.php.net/fix.php?id=62627&r=fixed
Fixed in SVN and need be documented: 
https://bugs.php.net/fix.php?id=62627&r=needdocs
Fixed in release:                    
https://bugs.php.net/fix.php?id=62627&r=alreadyfixed
Need backtrace:                      
https://bugs.php.net/fix.php?id=62627&r=needtrace
Need Reproduce Script:               
https://bugs.php.net/fix.php?id=62627&r=needscript
Try newer version:                   
https://bugs.php.net/fix.php?id=62627&r=oldversion
Not developer issue:                 
https://bugs.php.net/fix.php?id=62627&r=support
Expected behavior:                   
https://bugs.php.net/fix.php?id=62627&r=notwrong
Not enough info:                     
https://bugs.php.net/fix.php?id=62627&r=notenoughinfo
Submitted twice:                     
https://bugs.php.net/fix.php?id=62627&r=submittedtwice
register_globals:                    
https://bugs.php.net/fix.php?id=62627&r=globals
PHP 4 support discontinued:          
https://bugs.php.net/fix.php?id=62627&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=62627&r=dst
IIS Stability:                       
https://bugs.php.net/fix.php?id=62627&r=isapi
Install GNU Sed:                     
https://bugs.php.net/fix.php?id=62627&r=gnused
Floating point limitations:          
https://bugs.php.net/fix.php?id=62627&r=float
No Zend Extensions:                  
https://bugs.php.net/fix.php?id=62627&r=nozend
MySQL Configuration Error:           
https://bugs.php.net/fix.php?id=62627&r=mysqlcfg