i am trying to rewrite url's such way as main page should be http://example.com/index.php or http://example.com and content page will be http://example.com/adobe or some thing else.
Search for mod_rewrite. There are hundreds of tutorials.
You'll need .htaccess.
Google: .htaccess + mod rewrite as friend said.
yup that is call url rewriting....its done for SEO purpose. and there is a involvement of 301 page in it. i have a little knowledge about it..sorry i wish i could help
Nice tutorial to learn about rewrite mod