How do I put a filter expression in the URL using Perl?

[spyka]

I have issue regarding paging using filter expression. Here's the piece of code for filtering:

if ( $q->param("Filter") )
            {
            $Id=$q->param('User_Id');
            $Name=$q->param('User_Name');

           if ($Id ne "" )
                {
              $filterexpression= $filterexpression." UserId like '" .$Id. "%' and " ;
                 }
            if ($Name ne "" )
              {
            $filterexpression= $filterexpression." UserName like '" .$Name. "%' and " ;
               }
              }
            $filterexpression= $filterexpression. " UserId > 0"

and here's chunk of the paging code:

print qq[<td><a href="UsersList.cgi?
         pageNum=$pageN&limit=$limit&SortBy=$SortBy&SortOrder=$SortOrder">&lt;</a></td>];

The issue is I want to put the filter expression in this HREF after the sort order variable,
so that after filtering when I go for paging then only those records confined to the filter expression should be shown.

I tried to merge this way:

print qq[<td><a href="UsersList.cgi?
                pageNum=$pageN&limit=$limit&SortBy=$SortBy&SortOrder=$SortOrder
                 &Filter=$filterexpression">&lt;</a></td>];

but in URL I got to see something like this:

http://localhost/cgi-bin/UsersList.cgi?
                  pageNum=1&limit=3&SortBy=UserId&SortOrder=Asc&filter=%20%20UserId%20like%
                  20'1%'%20and%20%20UserId%20>%200

Later I tried to put the `$Id` value in a varible like:

$string =~ m/^$Id/;

but when I tried printing this variable I got nothing.PLEASE HELP ME OUT FIND THE SOLUTION,and apart from using CPAN is their any other solution because i am having 0% knowledge about it.

[numberwhun]

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