Forwarding www.example.com/abc to abc.example.com I am already using complicated RewriteRules and don't want to bother to jump into those forwarding rules. In addition, there is only one PHP file (index.php) in the directory/domain, so the simpler, the better in this case.
Google search does not show sub-pages from my website @Tom Thanks for your goodwill. Now, at least Google has my pages in its index. So, I guess it's okay now. Perhaps it was sitemap, but I'm not sure. Thanks any way!!