while (chomp($_ = <FILE>)) {
      do stuff;
   }

##</code><code>##

my $user = $q->param('username');
my $pass = $q->param('password');
verify($user, $pass) or die "No user or password incorrect";
sub verify {
   my ($ck_user, $ck_pass) = @_;
    open FH, $user_file" or die "Can't open file, $!";
   while (chomp($_=<FH>)) {
      my ($user, $pass) = split '\|';
      if ($user eq $ck_user) {
        if ($pass ne crypt(ck_pass)) {
           return 0;
        }
        else {
           return 1;
        }
      }
    }
    return 0;  
}