SEO php website

I got some ready made php website and I would like to know is it possible to ad meta tags and description to it? how to optimaze a php script is possible?

 

it's hard to say without seeing the script. Does it have a header include or anything similar?

 

yes its possible and pretty normal thing to do.
because no matter what server side language you use (in current case php) output is always rendered in client side language which is html and some client scripts like javascript,vbscript etc.

 

Like mong said, it's possible.
At work we use include in the head tags and link them to one html file which has the meta tags for every page and id's.

 

If you are using postnuke you can get a plugin to write dynamic descriptions/keywords based on the content. Other php based systems should have similar plugins for SEO purposes.

 

Just put a html code in your page. PHP script are not crawlable by bots.