just messing around hehe.
but this could be usefull some day.

my $string = '<a href=\'http://www.perlmonks.org/?node_id=646560">here
+</a>';
$string =~ s{<a href=(?:\"|\')*(?:\w+\://)*(?:www.)*perlmonks\.org/\?n
+ode_id=(\d+)(?:\"|\')*>([a-zA-Z\d\s\:\.\/\_\-]+)</a>}{[id://$1|$2]}gs
+;
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