This shows up older than the other answers on the original Q &: A question Apply regex to entire file, not just individual lines ? that's because I've been trying to get it posted all afternoon.

Ok Q & A isn't really designed to give you the kind of help you're looking for. Since you haven't logged in I can't contact you directly, but I've moved this to Seekers of Perl Wisom.

You asked

I'm trying to extract a specific block of recurring text from a daily-updated Web page, and output the result to a local file. I'm happy with my HTML retrieval, but then applying regex's on a line-by-line basis requires waaay too much tweeking on my part. How can I substitute across multiple lines? Preferably to the entire file.

See my answer below, I'm having real problems posting this question

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