Manual:$wgLogo/pt-br

Detalhes
A URL do logotipo do site (ou seja, a imagem exibida no canto superior esquerdo da página na maioria das instalações do MediaWiki). Ou uma URL totalmente qualificada ou um caminho relativo do DOCUMENT_ROOT. Se é um caminho relativo, tem que começar com uma barra (um arquivo no DOCUMENT_ROOT é escrito assim: /file.png, e não file.png).

The logo is expected to be 135 x 135 pixels. A bigger size can be used by modifying the site CSS (and smaller sizes are possible with no changes). Note that if you use a bigger image, MediaWiki will not resize this image! Instead, the image will be cut off so that only part of it (the upper left-hand corner to be precise) will be visible. If this corner is completely white, it might look like the image would not display although in fact it does.

Do not simply overwrite the default logo installed with MediaWiki ; this file will automatically be overwritten when you upgrade and your changes will be lost.

Examples
Upload your logo file onto your server. Let's say it ends up as /images/4/47/mylogo.png. Then you can use it as your site logo by adding this line to LocalSettings.php:

Make sure that you add this line below the definition of $wgScriptPath! Otherwise, $wgScriptPath will still be undefined and the logo will not be displaying.

Ver também

 * Como faço para mudar o logo?