PageRank Question - Will PHP $urls = array on homepage to subpages hurt?

I just finished building a new website, and I didn't like having a homepage, so I put an index.php in he root of the domain with the $urls = array command to randomly send the visitor to one of the sites 9 subpages.

Is this a bad idea?
Will this negatively affect page rank?
Will this destroy the sites ability to gain google sitelinks?

I really don't want to have a homepage. My method works great, but I'm afraid it will hurt SEO.