.htaccess help - non-www to www

Need some help with .htaccess. My current code is:

RewriteEngine On
RewriteCond %{HTTP_HOST}!^(www\.¦$) [NC]
RewriteRule ^ http://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301] 
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ([^/\.]+)/$ show.php?a=$1
RewriteCond %{HTTP_HOST} ^wmtoolbox\.com
RewriteRule ^(.*)$ http://www.wmtoolbox.com/$1 [R=301,L]
RewriteBase /

Code (markup):

What is does:

http://wmtoolbox.com >> http://www.wmtoolbox.com
http://wmtoolbox.com/free/ >> http://www.wmtoolbox.com/show.php/?a=free

Code (markup):

What I need is:

http://wmtoolbox.com/free/ >> http://www.wmtoolbox.com/free/

Code (markup):

Basically, change the non-www into the www counterpart. With my code, it gets rid of the url mask and shows the ugly show.php/?a=keyword
Any ideas?

 

on my site i do a site.com to www.site.com using below simple lines

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www\.site\.com [NC]
RewriteRule ^(.*) http://www.site.com/$1 [L,R=301]
</IfModule>

this then changes ALL / any URL from non-www to www.

 

Put this .htaccess file at root of your www directory:

RewriteEngine on
RewriteCond %{HTTP_HOST} !^www\.domain\.com [NC]
RewriteCond %{HTTP_HOST} !^$
RewriteRule ^(.*) http://www.domain.com/$1 [L,R]

Code (markup):

 

I have more simpler way . Using cPanel

Just add " * " as a sub domain using cPanel .

W8 for activation . After it gets activated . any sub domain will be using www.domain.com .

and catch the domain name using php code .

$domain="domain.com";
$host=$_SERVER[HTTP_HOST];
$sub_domain=explode($domain,$host);
$sub_domain=$sub_domain[0];
echo $sub_domain;

Code (markup):

Check Out http://raxor.info . Made on same logic

 

So called ugly URLs are caused by this part of the

RewriteRule ([^/\.]+)/$ show.php?a=$1

Code (markup):

 

Easy Way to do is like: