Session problems with PHP 4

[levelwave]

This script works under PHP 5 but not under PHP 4. I keep losing the contents of my session variables when I go from page to page. Any ideas on if anything in this code isn't compatible with PHP 4?

thanks

session_start();

require('phpscripts/functions.php');
require('phpscripts/dbconnect.php');



@$new = $_GET['new'];
@$item_id = $new;
@$_SESSION[ 'item_id' ] = $item_id;

check_valid_user();

require('main_top.php');

$query = "SELECT item_id, description, msrp FROM item WHERE item_id = '$item_id'";

$result = mysql_query( $query ) or die("mysql_query failed ".mysql_error());
$row = mysql_fetch_array( $result );

$query_description = "select image, extension from item_description where item_id = '$item_id'";
$result = mysql_query($query_description);
$row = mysql_fetch_array($result);		 
$image_ext = stripslashes($row['extension']);
$image_path = $item_id.$image_ext;


//if new item selected
if($new)
{

if( !isset($_SESSION[ 'cart' ]) )
{
    $_SESSION['cart'] = array();
    $_SESSION['img'] = array();
    $_SESSION['item_price'] = array();

	$_SESSION['items'] = 0;
	$_SESSION['total_price'] = 0.00;

}

if( isset($_SESSION['cart'][$item_id]) )
     $_SESSION['cart'][$item_id]++;


 else{
     $_SESSION['cart'][$item_id] = 1;

  }
   $_SESSION['img'][$item_id] = $image_path;
   $_SESSION[ 'imageExist' ][$item_id] = $image_ext;

[paulnaj]

Hi levelwave,

Try putting ...

session_start();

... before any calls to the $_SESSION variable.

Paul.

[levelwave]

You mean at the top of all my scripts?

~john

[paulnaj]

Well I'd test to make sure it does the job first on one page.

You would have to call session_start() at least once on any 'page' that uses sessions and before the first use of the $_SESSION variable.

P.