A switch between ascending and descending table rows on a tableheader click

Question

I\'ve been messing with this for quite some time now, but I just can\'t get it to work. What I\'m trying to make is ;

A clickable table header, that once clicked swi

Answer 1

Just add a link to your table header cell which contains a parameter, e.g.

   
      Name
   

What happens here? A link will be added, containing an order parameter which is set to the opposite of the current order value(1/true or 0/false) or to 1 as default.

In your PHP script you can now decide how to order your table using the order value:

$isAsc = isset($_GET['order'])? (bool) $_GET['order']: 1;

Now you can use the $isAsc boolean:

if ($isAsc) {
   // Sort data ascending
} else {
   // Sort data descending
}

Or in a query:

$sql = "SELECT * FROM tabe ORDER BY name ".($isAsc?"ASC":"DESC").";";

Of course, you can extend this idea, e.g., by adding column names to sort by several columns.