search engine optimization and php

Just curious as to how people handle search engine optimization when most of the page content is dynically built from the db. Doesn't the bots need to crawl the static pages and match your keywords to actual words in the file? Also, is it not a good idea to put all your meta keywords into a header.inc.php script that is then pulled into each page when it is loaded? Thanks, Eddie WARNING: The information contained in this message and any attachments is intended only for the use of the individual or entity to which it is addressed. This message may contain information that is privileged, confidential and exempt from disclosure under applicable law. It may also contain trade secrets and other proprietary information for which you and your employer may be held liable for disclosing. You are hereby notified that any unauthorized dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify HIPAA@echoman.com by E-Mail and then destroy this communication in a manner appropriate for privileged information.