in reply to file input problem

If you are running it as a cgi script then you must print some http headers before you print the content. For this use CGI.pm

eg:

use CGI;

my $q = new CGI;
print   $q->header,                    # create the HTTP header
        $q->start_html('Whatever'), # start the HTML

open(FILE, "data.txt");   
  while(<FILE>){         
     chomp;
     print "Saw $_ in data.txt<br>\n"; 
  }
  close FILE;  

print $q->end_html;

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You could really do with finding out the error_log file for your web server and seeing what it prints out about your script.
Apache by default has an env.cgi in the cgi-bin directory. Try http://server.name.com/cgi-bin/env.cgi and have a look for the server root directory there.

If you dont have CGI.pm then try this. I'm not sure if it will work but it should 


print "Content-type: text/html\n\n";
print "<HTML><HEAD><TITLE>STUFF</TITLE>";
print "</HEAD><BODY>"
open(FILE, "data.txt");        
  while(<FILE>){         
     chomp;
     print "Saw $_ in data.txt<br>\n"; 
  }
close FILE;    
  print "</BODY></HTML>";

[download]

-Diarmuid

In Section Seekers of Perl Wisdom