foreach through a session variable

Question

I would like iterate on each Object in my session variable. 'items' is of type item which is a class I've created to store book information. I have done a count($_SESSION['items']) which returns a 1 so i thought it should iterate at least once. But no luck. Thanks

  foreach ($_SESSION['items'] as $item) {
   echo TEST;
   $sql = 'SELECT * FROM item WHERE Item_ID = '.$item->Get_Item_ID;
 var_dump($sql);
 }

Answer 1

Why are you storing an object in a session variable?

http://php.net/manual/en/function.serialize.php

Should be able to serialize and deserialize the object into a format that you can store within a cookie.

I think $_SESSION can only store strings and arrays.

Answer 2

I would like to note that you should never perform a query in a nested loop like that. Rather, you should qualify your query like such....

$sql = "SELECT * FROM item WHERE Item_ID IN (".implode(",", $_SESSION['items']).")";

Of course, you need to ensure that $_SESSION['items'] is an array with at least one value, and that all values in $_SESSION['items'] are in fact integers (or can pass for integers [such as string "6"]).

Answer 3

I think you forgot to serialize/unserialize the object. It's not possible to just assign a object into a session variable. This is because the session gets written out into a file where your object stops to exist. Use serialization to store an object into the Session.

Page 1:

 $user = new User();
 $_SESSION['user'] = serialize($user);

Page 2:

 $user = unserialize($_SESSION['user']);

Best wishes,
Fabian

Answer 4

One final thing, ensure that the class definition for type 'item' is loaded before de-serializing your objects from the session. Otherwise you'll get errors when trying to access fields or methods on the object.