foreach my $plugin (glob("*.plugin")) { 
    do $plugin; 
  }
 

##</code><code>##

  foreach my $plugin (glob("*.plugin")) { 
    do $plugin; 
    
    if (!exists(&plugin::do_stuff) or !exists($url)) { 
      die "Invalid plugin: function(s) not implemented.\n";
    }

    # Call the various plugin 'methods'
    plugin::do_stuff(); 

    undef (&plugin::do_stuff); 
  }