Following example display “mysite.org/article-23.html” for “mysite.org/article.php?newsid=23″.

RewriteEngine on
RewriteRule ^product-([0-9]+)\.html$ product.php?id=$1

Following example display “mysite.org/headline/localnews/23.html” for “mysite.org/headline.php?newsid=23″

RewriteEngine on
RewriteRule ^headline/([a-zA-Z0-9_-]+)/([0-9]+)\.html$ headline.php?newsid=$2

Following example automatically redirect to www URL if user types some non www URL.
Example: if you type “mysite.org” it will automatically redirected to “www.mysite.org”.

RewriteEngine On
RewriteCond %{HTTP_HOST} ^mysite\.org$
RewriteRule (.*) http://www.mysite.org/$1 [R=301,L]

Following example display “http://www.mysite.com/123″ for “http://www.mysite.com/newsid=123″.

RewriteEngine On
RewriteRule ^([a-zA-Z0-9_-]+)$ article.php?newsid=$1
RewriteRule ^([a-zA-Z0-9_-]+)/$ article.php?newsid=$1

Following example point “http://www.mysite.org” to “http://www.mysite.org/russian”. This is simple example of pointing root folder to subfolder.

RewriteEngine On
RewriteCond %{HTTP_HOST} ^mysite\.org$ [OR]
RewriteCond %{HTTP_HOST} ^www\.mysite\.org$
RewriteCond %{REQUEST_URI} !^/russian/
RewriteRule (.*) /russian/$1