Skrap pris og produktbillede af URL

Hejsa

Jeg har i noget tid tumlet med et par problemer med et projekt jeg laver.

Det er desværre på engelsk, da jeg har bedt om hjælp på et andet forum uden held, men mon ikke i forstår det alligevel? :-)

På forhånd tak for din tid.



First of, let me say that I'm a Frontend engineer, with limited knowledge to PHP. I can make simple webservices to complete my projects, but I'm not near calling myself a Backend developer. :-)

I'm making a website in my spare time, where users can enter a URL of a product and the service, made in php, returns the 5 largest images on the page, sorted by size. The largest image is, usually, the correct image. Mark this as half done.. :-)

However, now I need to get the price that match the product, not just any price on the page. A lot of webshops lists alternative or related products with prices as well, so there could be numerous instances. I could bubble up the Dom three and match the first price that's inside the same parent as the selected image. But is that the way to go?

How do I track down the main content of a page, so my image getter function is more precise, and the price is correct? As I don't know the markup, how would I recognize the main content?

As for getting prices, I tried getting all elements with indexOf price in class, which works in 90% of the time. But that gives me, as mentioned before, all prices - not THE price.

So, long story short. How do I: 1. recognize main content of a webpage, without knowing it's markup? 2. Or find the price that match the image selected as the right one?