@phpdeveloper.org
In a (very) brief post on Simplesem.com today, there's some suggestions to help you and your site be properly noticed by Google and other search engine spiders out there.
It's common tendency for Search Engine Optimization specialists to avoid use of dynamic URLs and not groundlessness. Search Engine Spiders don't index URLs overwhelmed with dynamic parameters.
So if your site is PHP-based and resides on an Apache Server then you might consider carrying out these four simple steps to boost your traffic.
The steps are basic, but they are a good place to start if you're looking at getting started with "search engine optimization". The main suggestion is to use an Apache rewrite rule to change url parameters into part of the path (and vice-versa). Obviously, it's not the solution for everyone as you'd need access to the server's config to use it.