CodeIgniter: .htaccess file (from CodeIgniter.tv)
<IfModule mod_rewrite.c>
# allow_override On
# mod_rewrite is installed
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
<IfModule mod_php5.c>
RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>
<IfModule !mod_php5.c>
RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>
</IfModule>