So you want to match: 
m{
     <strong                    # match "<strong"
     .*?                        # skip to the next
     (                          # (start capturing)
         http://                # "http://"
         .*?                    # skip to the next
     )                          # (stop capturing)
&                               # ampersand
}x

[download]
Or, more concisely, m{<strong.*?(http://.*?)&}.

In reply to Re: Pattern Matching Q? by educated_foo
in thread Pattern Matching Q? by 80degreez

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