Variable value as part of array key

Question

$pname = "postback_".$data;
$_SESSION["$pname"] = $data;

It is not working. How to use it?

Answer 1

Make sure that you have put session_start(); on top of your script.

Answer 2

the correct usage would be $_SESSION[$pname]

Answer 3

<?php
session_start();

$pname = "postback_".$data;
$_SESSION[$pname] = $data;

?>