我也反对这一点。我也在安装Code Igniter。
古怪的不是RewriteBase。这是我的.htaccess:
DirectoryIndex index.PHP
RewriteEngine on
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond $1 !^(index\.PHP|robots\.txt)
RewriteRule ^(.*)$ index.PHP?/$1 [L]