rewrite dynamic url - .htaccess

Question

I have the following problem:
http://www.mydomain.com/articles.php?artid=89
should become: http://www.mydomain.com/mykeyword
I dont mind if the id remain in the url...like: http://www.mydomain.com/89/mykeyword
I have the following .htaccess for the moment:
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^(mydomain\.com)$ [NC]
RewriteRule ^(.*)$ http://www.%1/$1 [R=301,L]
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s/+news\.php [NC]
RewriteRule ^ mykeyword [R=301,L]
RewriteRule ^mykeyword/?$ news.php [L,NC]
The above part works like a charm.
Any help will be deeply appreciated.
Regards, Zoran

Answer 1

Append these rule at the bottom of your .htaccess:
RewriteEngine On
RewriteBase /turkexpo/
RewriteCond %{HTTP_HOST} ^(webone\.gr)$ [NC]
RewriteRule ^(.*)$ http://www.%1/turkexpo/$1 [R=302,L]
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s/+turkexpo/news\.php [NC]
RewriteRule ^ mykeyword [R=302,L]
RewriteRule ^mykeyword/?$ news.php [L,NC]
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s/+turkexpo/articles\.php\?artid=([0-9]+) [NC]
RewriteRule ^ %1/mykeyword? [R=302,L]
RewriteRule ^([0-9]+)/mykeyword/?$ articles.php?artid=$1 [L,NC,QSA]
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s/+turkexpo/companies\.php\?fairid=([0-9]+)&ehallid=([0-9]+) [NC]
RewriteRule ^ companies/%1/%2? [R=302,L]
RewriteRule ^companies/([0-9]+)/([0-9]+)/?$ companies.php?fairid=$1&ehallid=$2 [L,NC,QSA]
This will forward a URI of /89/mykeyword to /articles.php?artid=89 and externally redirect the opposite of it.
Once you make sure it is working change R=302 to R=301.