I'm not quite sure what you're asking for.
If you are asking for someone to detail with screen shots how to program a shopping cart in PHP, teaching programming is way beyond the scope of this forum. If you don't know how to program a cart with the features you want, you would probably be better off purchasing a ready-made cart or downloading one of the many open source carts available. Shopping carts need security features that probably should not be attempted by beginning programmers.
If you already have shopping cart software, and you're asking for help in learning how to install, configure or use the software, you would probably be better off asking the people who wrote the software, or (if it's open source) consulting the cart's support forum or wiki. Every cart is different, so instructions that would be useful to you would be worthless to everyone else who uses a different software.
If you're looking for advice on how to optimize your ecommerce website, refer to our
[url=http://www.highrankings.com/forum/index.php/topic/833-tips-for-new-seos/]Tips for Newbies[/url], then consult with whoever sold and/or programmed the software to learn how to implement those suggestions in the specific cart software you have.
--Torka