losing object stored in session after unserialize

Soviut

I'm having a problem with an object i'm storing inside a session. My process is as follows:

Page 1 (form): Contains a simple form with serveral form fields. The form submits using the POST method to Page 2.

Page 2 (processing): This is a non-visual processing-only page. It takes the POST variables, puts them all into a "Form" object i wrote. The object uses a multidimensional array to store the name and value of the POST variables, as well as their type (email, postal code, password, etc.) and validity. The object is then validated using a custom validator object i wrote.

If the one or more of the fields turns out to be invalid the Form object is serialized, inserted into the session. The page is then server-side redirected back to Page 1. On Page 1 the object is unserialized back into a program-level object. The object works fine, with both the data and methods returning flawlessly from the unserialization. However, if i hit refresh or go to another page and click the back button to return to Page 1 it gives me an error. The error says that the unserialize command can no longer detect the serialized string within the session. For some reason, the session seems to be clearing the object.

I'm at a loss as to why this is happening. Has anyone else experienced anything similar?

Thanks in advance

kevinsequeira

once u unserialize the object, it might be reassigned to the session in the page1 or are u initialising the session in page1 which might clear out everything
maybe if u post the code we could take a look and help you out

reg
kevin

Soviut

These pages are going to be out of order, but this is how the processes flow.

Page 2: Data is collected from the POST, added to the Form object, and the object is then serialized and put into the session. The page then redirects back to Page 1.

include_once("includes/form.obj.php");

$form = new form();

$form->addItems($_POST);

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

header("Location: test.php");
exit;

Page 1: This code is only run on post back from Page 2 since Page 2 puts the form object into the session. The object unserializes from the session properly since my getField method works fine, returning the value of the Email field in the object.

include_once("includes/form.obj.php");

if (isset($_SESSION["form"]))
{
	$form = unserialize($_SESSION["form"]);

$form->getField("email", "value"));
}

kevinsequeira

dont u need to register the session again on page1 ?? Cause you are getting it to page1 but for it to be accessed again you need to register it again right ?

try
$_SESSION["form"] = serialize($form);
or session_register() somewhere on page1

not sure if this what is causing the problem though ..

reg
kevin

kevinsequeira

u might want to read the manual about what is says when using $_SESSION

http://www.php.net/manual/en/function.session-register.php

reg
kevin

Soviut

I'm not using session_register() at all since it requires that global variables be turned on in the configuration. Also it would seem strange that i would have to keep reinserting the object into the session because all other variables stay in the session, no matter how many times i read from the session.

Soviut

Well, I've solved my problem, however my solution is rather embarassing. It had to do with my variable naming. I changed my $form object name to $myForm and everything worked. Obviously the $form variable was conflicting, or being changed somewhere along the line in my code.