in reply to Quick regex for finding something in an OPTION tag

The regex you want is trivial: /^0_memberOf_/. Figuring out where to use it is more interesting. Using HTML::Parser you could:

use warnings;
use strict;
use HTML::Parser;

my $html = <<HTML;
<html>
  <body>
    <option value="0_memberOf_x">Ya want this?</option>
  </body>    
</html>
HTML

my $h = HTML::Parser->new ();
my @stack;

$h->handler (start => sub {return startOption  (\@stack, @_);}, 'tag, 
+attr');
$h->handler (text => sub {return optionText  (\@stack, @_);}, 'text');
$h->handler (end => sub {return endOption  (\@stack, @_);}, '');
$h->parse ($html);


sub startOption {
    my ($stack, $tag, $attr) = @_;

    push @$stack, [$tag, $attr->{value}];
}


sub optionText {
    my ($stack, $text) = @_;
    
    return unless @$stack;
    push @{$stack->[-1]}, $text;
}


sub endOption {
    my ($stack) = @_;
    my ($tag, $match, $text) = @{pop @$stack};
    
    return unless $tag eq 'option' && defined ($match) && $match =~ /^
+0_memberOf_/;
    print "$match: $text\n";
}

[download]

Prints:

0_memberOf_x: Ya want this?

[download]
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