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Bug #50267 get_browser with null parameter runs on empty user agent string
Submitted: 2009-11-23 05:18 UTC Modified: 2009-11-24 02:39 UTC
From: nachumk at gmail dot com Assigned:
Status: Closed Package: *General Issues
PHP Version: 5.3.1 OS: Windows XP 32 bit
Private report: No CVE-ID:
 [2009-11-23 05:18 UTC] nachumk at gmail dot com
get_browser should work with null string and doesn't when using 5.3.1. 
5.2.11 works fine.

Reproduce code:
echo "User Agent: " . $_SERVER['HTTP_USER_AGENT'] . "<br>";
echo 'print_r(get_browser($_SERVER[\'HTTP_USER_AGENT\'], true));<br>';
print_r(get_browser($_SERVER['HTTP_USER_AGENT'], true));
echo '<br>print_r(get_browser(null, true))<br>';
print_r(get_browser(null, true));

Expected result:
That both get_browser calls should produce identical results.

Actual result:
The first call with $_SERVER['HTTP_USER_AGENT'] returns proper results 
and the call with null returns a default response (same as what it would 
return with a completely empty user agent string).


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 [2009-11-23 05:20 UTC] nachumk at gmail dot com
I am running Apache 2.2.14 (apache_2.2.14-win32-x86-openssl-0.9.8k.msi), 
PHP 5.3.1 (php-5.3.1-Win32-VC9-x86.msi (both as module and cgi), and 
php-5.3.1-nts-Win32-VC9-x86.msi), on Windows XP 32 bit.

It works when I run PHP 5.2.11.
 [2009-11-24 00:18 UTC]
Automatic comment from SVN on behalf of jani
Log: Fixed bug #50267 (get_browser(null) does not use HTTP_USER_AGENT)
 [2009-11-24 00:18 UTC]
This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
Thank you for the report, and for helping us make PHP better.

 [2009-11-24 02:39 UTC] nachumk at gmail dot com
Thank you
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