use Apache;

  # path_info will contain a leading slash. You might want to get
  # rid of trailing slashes too ... YMMV
 (my $path = Apache->request->path_info) =~ s#^/##;

  my %param = split /[\/=]/, $path;

  print "$param{variablea}:$param{variableb}"; # 3892:"test"