Hi i have asked so many times this question but no one gave me right and good answer,


I need to know how these website search thousands of deal from different compnaies for user on their own website ..

Example.

www.lastminute.com

www.kelkoo.co.uk


etc

For starters, it's because you're calling it screen scraping when it isn't.

As far as your question goes, the answer is that the data is likely stored in a database on their own site, much like a search engine stores web pages for results. They either have an automated or manual process whereby they gather the data into the database (likely automatic) and then it's there for others to use.

There's really not much more to it than that.