Manual:$wgUsePathInfo/pt-br

Detalhes
Se desejar usar URLs "bonitas" (ou URLs curtas), ou seja,

Note: Elas freqüentemente falham quando o PHP é configurado em modo CGI. O PATH_INFO *pode* ficar correto se o cgi.fix_pathinfo estiver definido, mas, novamente, talvez não; o lighttpd converts incoming path data to lowercase on systems with case-insensitive filesystems, and there have been reports of problems on Apache as well. To be safe we'll continue to keep it off by default in these instances.

Override this to false if $_SERVER['PATH_INFO'] contains unexpectedly incorrect garbage, or to true if it is really correct.

Valor padrão
Note that prior to 1.9.0, only 'cgi' was checked for.

Veja também

 * $wgArticlePath
 * Manual:Short URL