更新第+1列

I am trying to update my database when a page is visited.

Here is my code

        <?php

            $con = mysql_connect("localhost","xxx","xxx");
    if (!$con) 
  {
       die('Could not connect: ' . mysql_error());
   }

    mysql_select_db("xxx", $con)or die( "Unable to select database");

    $id=$_GET["q"];

    $sql="UPDATE audit SET lks =lks+1 WHERE id='$id'" or die(mysql_error());

    ?>

The database does not update at all?

Can anyone help?

you are not actually executing the query:

<?php

$con = mysql_connect("localhost","xxx","xxx");
if (!$con) 
{
   die('Could not connect: ' . mysql_error());
}

mysql_select_db("xxx", $con)or die( "Unable to select database");

$id=$_GET["q"];

$sql="UPDATE audit SET lks =lks+1 WHERE id='$id'";
mysql_query($sql) or die(mysql_error());
?>

You never query the sql statement.

mysql_query($sql);

And I wouldn't suggest using the mysql_* library, it's deprecated and isn't as secure as something like PDO or mysqli