Best way to handle XML is to use XML modules such as XML::Simple, XML::Twig, etc.....

Here is the code which will do what you need....

use strict;
use warnings;

my $data=<DATA>;#As only one line in the file...
my @member_nos = $data=~m/<member_id>(\d+)/g;
print join $/,@member_nos;
__DATA__
<member_id>60</member_id><a>a</a><b>b</b><member_id>74</member_id><mem
+ber_id>83</member_id>
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