I'm not sure exactly what you want, but you should be able to do it with the /e modifier. At the beginning of your script you have something like this: 
my $replacement = sub {
    return unpack("a1", shift);
};

[download]
and then later 
for (@array) {
    s/HAI WORLD Times ([0-9]+).*/
        '\t\t<exML LOLZ = "' . $replacement->($1) . '"/>'
        /eg;
}

[download]

In reply to Re: Function call in regex replacement string by tilly
in thread Function call in regex replacement string by PoorLuzer

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