[RESOLVED] Sessions Objects etc..

[stew]

session_start();

$game = null;

print_r($_SESSION);

if(!isset($_SESSION["game"]))
{
    $game = new StockGame;
    $game->buildGame();
}
else
{
    $game = unserialize($_SESSION["game"]);
}

print_r($game);

if(!$game->checkGameComplete())
{
     $game->nextGo();
}
else
{
    session_destroy();
    print "destroying game";
}

$left = $game->getTurnsRemaining();

print_r($game);

$_SESSION["game"] = serialize($game);

Hey there guys the above code doesn't appear to be saving the $game as a session variable ( i have cookies enabled!!). also the print_r($_SESSION), prints an array with the 'game' key being null/not set.

I know that you need to serialise objects when storing them as session variables so i can't really see why the above script isn't working.

Also I know that the session destroy function isn't being called as nothing is being printed.

any ideas?

stew

[devinemke]

you are never calling your class definition for StockGame. you must do this prior to calling session_start().

[dream_scape]

you don't have to serialize your object to and from the session. PHP does that automatically. You can also use "$_SESSION['game']" directly as an object:

/*! must include game class definition before session_start() !*/

session_start();

if (!isset($_SESSION['game'])) {
	$_SESSION['game'] = new StockGame();
	$_SESSION['game']->buildGame();
}

if (!$_SESSION['game']->checkGameComplete()) {
	$_SESSION['game']->nextGo();

$left = $_SESSION['game']->getTurnsRemaining();
} else {
	session_destroy();
}

Or if you really want to use just $game, then you can do something like:

/*! must include game class definition before session_start() !*/

session_start();

if (!isset($_SESSION['game'])) {
	$game = new StockGame();
	$game->buildGame();
	$_SESSION['game'] = $game;
} else {
	$game = $_SESSION['game'];
}

if (!game->checkGameComplete()) {
	$game->nextGo();

$left = $game->getTurnsRemaining();
} else {
	session_destroy();
}

That should be ok with PHP 5, but with PHP 4, you will need to change the line "$SESSION['game'] = $game;" to "$SESSION['game'] =& $game;" and change "$game = $SESSION['game'];" to "$game =& $SESSION['game'];".

[stew]

sorry I just excluded the lines for class definitions so that there was less code... they were there in the file!

i've tried changing the code to

require_once("StockGame.class.php");
require_once("stockItem.class.php");
require_once("StockItemList.class.php");


session_start();

$game = null;

print_r($_SESSION);

if($_SESSION["game"] == null)
{
    $game = new StockGame();
    $game->buildGame();
    $_SESSION["game"] = $game;
    print_r($_SESSION["game"]);
}


//print_r($game);

if(!$_SESSION["game"]->checkGameComplete())
{
     $_SESSION["game"]->nextGo();
     print_r($_SESSION["game"]);
}
else
{
    print "destroying game";
    session_destroy();
}

print_r($_SESSION["game"]);
$left = $_SESSION["game"]->getTurnsRemaining();
//print_r($game);
print_r($_SESSION["game"]);



print "<br /><br /><a href=\"test_item.php\">next</a> || you have ".$left." remaining";

print_r($_SESSION["game"]);

and everything appears as it should when I dump the objects... but when I click the link at the bottom or refresh the page, the $_SESSION["game"] is again null.

???

[dream_scape]

do you have register_globals enabled? If so, that might explain it because of the "$game = null;", which BTW you do not need (you do not have to declare variables before using them in PHP). Sometimes it helps with coding, but in this case, I can see no reason you're doing that.