Thanks for taking the time to report this!

Is the corresponding MediaWiki language extension bundle installed? See https://www.mediawiki.org/wiki/MLEB

Honestly, I 1) failed myself to find information about MLEB in less than 5min,

2. the installer should fail more gracefully telling you what to do.

Andre: what information about MLEB were you looking for and why do you think it is related?

If the php 3.5.25 is not a typing mistake, you must upgrade. PHP 5.3 is required. I have no idea at the moment why that piece of code would throw reflection exception.

seteselos wrote:

Oops, sorry. Actually a typo. The PHP version being used is 5.3.25.

seteselos wrote:

I also efetuei downtown mediawiki other versions, and the error occurs on all of them, do not know what the problem is.
Tested Versions: 1.21.1, 1.20.6 and 1.19.7. All stable version.

Call Stack

# Time Memory Function Location
1 0.0035 338808 {main}( ) ..\index.php:0
2 0.2013 9116808 wfInstallerMain( ) ..\index.php:18
3 0.3872 14512216 WebInstaller->execute( $session = array () ) ..\index.php:50
4 0.3874 14512064 WebInstaller->setupLanguage( ) ..\WebInstaller.php:154
5 0.3889 14557616 Language::factory( $code = 'pt-br' ) ..\WebInstaller.php:486
6 0.3889 14557616 Language::newFromCode( $code = 'pt-br' ) ..\Language.php:184
7 0.4915 15782992 MWInit::classExists( $class = 'LanguagePt' ) ..\Language.php:228

8 0.4915 15783280 __construct ( 'LanguagePt' ) ..\Init.php:168

I appreciate the help.

Bug 43877 might be the same / a similar problem.

(In reply to comment #2)

Andre: what information about MLEB were you looking for and why do you think
it is related?

Niklas: What I wanted to know is written in the sentence in comment 1 which has the question mark at the end. I haven't yet thought that is related.

This is not a bug in MediaWiki but rather a server misconfiguration.

Try setting xdebug.show_exception_trace = 0 in php.ini, or just disable
the xdebug extension entirely (that extension is not something you should
use on a "production" wiki because it reduces performance).

PleaseStand: Oh thanks for enlightening me! (us?) :)
Do you think this also applies to bug 43877?

• Bug 43877 has been marked as a duplicate of this bug. ***

(In reply to comment #8)

• Bug 43877 has been marked as a duplicate of this bug. ***

Yes, it looks like the same problem. See bug 33949 as well.