Get specific content out of an URL read using CURL

How开发者_高级运维 can I get specific content out of a URL fed into CURL? I'm unsure as to how to begin doing this, and haven't been able to Google for it properly since I don't know exactly what I'm looking for.

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I have already written an answer about that here for a question entitled "How to display content from one site on another using PHP?"

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you probably want to use regexes to do a search for the local portion of the page that you want to scrape for content look up

http://php.net/preg_match