does anyone have any information regarding search engines and php? i am concerned that a site i am developing will take a hit in ranking because the content is going to be delivered from a mysql database.
Do search engines still rank on how often a word appears in your site?
Read the articles about creating search-engine friendly websites in the articles section on this site.
if your concern is that it wont read the mysql generated data when it indexes your page... it will.
BUT, it will always use that data until it crawls your site again.
The real issue is that some search engines only index pages ending in .html or .htm
You can configure most web servers to parse .html files as php and then just name all your files .html.