I have written a function to parse a text file to find a string. The below script parses the file 'search.txt' for the string 'abc' and throws an error if the string is NOT present. Now, I would like to parse the same text file to see if the string is NOT present. It should throw an error if the string IS PRESENT. If the string 'abc' is present in search.txt" it should throw an error. So I need one perl function which does both the things mentioned above. It would be really helpful if below function is edited to accomplish both the tasks.

 sub find_string
             {
            my ($file, $string) = @_;
            open my $fh, '<', $file;
            while (<$fh>) {
           return 1 if /\Q$string/;
           }
        die "False :Test result is FAIL";
          }
      find_string('search.txt', 'name: abc ');
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