Search and return customizable order

Hey I'm a 'newbie' to php so treat me nice~

I have a basic understanding of how things work~

I am looking to make (or have made for me) something that will scan through a website (a store type) and return a list of the items in a greatest to least order of all the items.

Now in my head this seems simple enough~

Would I be wanting to do this in PHP?

Would anyone be willing to help me along?

Thank you for your time~