How can I set a session for multiple links that I want to disable?

Question

piece of file1.php:

<a href="file2.php?addid=1">Add this to DB</a>

This takes the user to a page where the data gets inserted into the database.

file2.php :

 $clicked = $_GET['addid'];
 $_SESSION['clicked'] = $clicked;
 // data gets inserted
 header("Location: file1.php?id=$clicked");

But I have got multiple pages (like: file1.php?id=1 | file1.php?id=2 | file1.php?id=3 etc.). Can the session variable handle multiple numbers? Is there any way to do this?

Any help appreciated.

(P.S.: Currently I am using the GET method to disable the links, but I think SESSION is more reliable.) (P.P.S.: I need this for a voting script.)

Answer 1

To hold more data in one session variable, you need to create a multi-dimensional array which will hold multiple against $_SESSION['checked']. You can do this like:

$clicked = (int)$_GET['addid'];
$_SESSION['clicked'][$clicked] = true;
// data gets inserted
header("Location: file1.php?id=$clicked");

(also, you should be sanitizing $_GET['addid'].

Then to check if it is set, you can use array_key_exists:

if(array_key_exists($clicked,$_SESSION['clicked'])){
  echo "this button should be disabled!";
}