# assume $regex has been built with qr// and matches what you want
my $regex = qr/foobar/;

# assuming $data contains all the data you want to scan from

my @things_im_interested_in = ( $data =~ /($regex)/g );
# or, if it isn't and you are doing this from multiple data
# strings

push @things_im_interested_in, $data_chunk =~/($regex)/g;