OK, I think I can help you with your problems 1 & 2, but I don't know anything about 3.

1

Your first question is about matching multiple times on multiple lines in one string, right? Your question would apply to data in the form of:

FOO=1
FOO=2
FOO=3
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right?

#! /usr/bin/perl -w 

use strict;

my $string = "FOO=1\nFOO=2\nFOO=3\n";

my @list;
while ($string =~ /^FOO=(\d)/mg) {
        push (@list,$1);
}
print join(",",@list)."\n";
# prints out 1,2,3
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Note the 'mg' at the end of the regex. The 'm' means you're dealing with multiline strings, and the 'g' means global matching.

Does that answer question number 1?

2

You're scanning the html code block for the pound and dollar values, right? I don't know if this is the right way to do this, but I usually do this kind of thing like this.

Assuming all dollar values are prefixed by $ and pound values are not and that there aren't any other numbers that look kindof like money in there.

my $dollars = 0;
my $pounds = 0;
while(<FILE>) {
        if (/>(\d+\.\d{2})<) {
                # no dollar sign, must be pounds
                $pounds = $1
        } elsif (/>\$(\d+\.\d{2}) {
                # it's got a dollar sign, must be a dollar
                $dollars = $1;
        }
}
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