Getting All the Environment Variables of the Server

Below is a small Perl code that Shows all the environment variables of the Server on which it is run.

Code:

#!/usr/bin/perl 
   
   print "Content-type: text/html\n\n"; 

   print "<tt>\n"; 
   foreach $key (sort keys(%ENV)) 
   { 
      print "$key = $ENV{$key}<p>"; 
   } 

just call the perl file containing he above code in the browser after setting the appropriate permissions.