I appreciate any help I can get with this problem:

1. I have 2 search forms, one does a keyword search and the other does a search by country, state and city (with an input for each)
2. The results are output to a table. The header row contains a link for sorting each column.
3. Problem is I don't know how to build my GET url string for sorting and assign them to the links in the headers

Here is some code to get started (I am using MVC)

### Functions

```
function searchkeyword()
{
    /* get keyword an query and output paginated result */
}

function searchcategory()
{
    /* get categories and query and output paginated result */
}

function sort()
{
    $sortby = $_GET['sortby'];
}

function paginate()
{
}

```

### View

```
<th>
    <a href="sort.php?XXXX">Sort Column</a>
</th>

```

I'm not sure what should go in **XXXX** to sort the results.