Problem with sessions...

[kdoggy]

Hi,

I am having some problems with sessions in building a shopping cart. I am sure it is a really simple problem I am just overlooking, maybe someone here can help?

I have attached the script to this message.

Thanks in advance!

[Mordecai]

Eer, it's in a mac format, can't read it (well, not very easily) on my PC.

Can you post the sections of the code that aren't working?

[kdoggy]

I don't know exactly which sections do not work, it just seems that the sessions never get registered. Here are the session-related code blocks:

<?php
	session_start();

if ($name!="") {
   		if (session_is_registered("ses_cart_items")) {
   			$cart_position_counter=0;
			$double=0;

		if ($ses_cart_items>0){
			foreach ($ses_cart_name as $cart_item) {
				if ($cart_item==$name) {
					$double=1;
	      	   		$cart_position=$cart_position_counter;
	     	 	}

	    	 	$cart_position_counter++;
	   		}
		}

		if ($double!=1) {
			$ses_cart_id[]=$id;
			$ses_cart_name[]=$name;
			$ses_cart_qty[]=1;

			$ses_cart_items++;
		}
	} else {
		$ses_cart_id[0]=$id;
		$ses_cart_name[0]=$name;
		$ses_cart_qty[0]=1;

		$ses_cart_items=1;

		session_register("ses_cart_id");
		session_register("ses_cart_name");
		session_register("ses_cart_qty");

		session_register("ses_cart_items");
	}
}

if ($action=="delete") {
	array_splice ($ses_cart_id, $item, 1);
	array_splice ($ses_cart_name, $item, 1);
	array_splice ($ses_cart_qty, $item, 1);

	$ses_cart_items--;
}

if ($ses_cart_items>0){
echo "session registered";
} else {
echo "nothing here";
}
?>

Well, I access the script by:

cart.php?id=101&name=Test

But it does not register the session like it should, instead it just gives me the "nothing here" message.

Any suggestions?

[Mordecai]

Add this line above your if:
$ses_cart_items = $_SESSION["ses_cart_items"];

It seems you never (well, at least not in the code you most lately put up) defined $ses_cart_items.
Here's the last part of the code:

$ses_cart_items = $_SESSION["ses_cart_items"];
if ($ses_cart_items>0){ 
echo "session registered"; 
} else { 
echo "nothing here"; 
}

It registered correctly with me after adding that line.

[kdoggy]

Hi,

The suggestion you made does not seem to work still. Is there any possibility that certain servers may not support sessions? Or is there something else in my code that is wrong?

Thanks!

[kdoggy]

Hi,

I changed the file to one that should be easier to read by PC users. It is attached. Any help would be appreciated!

Thanks!

[kdoggy]

Hi,

I think I am getting closer to solving my problem. I can now get the sessions to register, but only for that page view, if I go to any other page or even reload that page the session values are gone.

if ($_GET['name']!="") {
   		if (session_is_registered("ses_cart_items")) {
   			$cart_position_counter=0;
			$double=0;

		if ($ses_cart_items>0){
			foreach ($ses_cart_name as $cart_item) {
				if ($cart_item==$_GET['name']) {
					$double=1;
	      	   		$cart_position=$cart_position_counter;
	     	 	}

	    	 	$cart_position_counter++;
	   		}
		}

		if ($double!=1) {
			$ses_cart_id[]=$_GET['id'];
			$ses_cart_name[]=$_GET['name'];
			$ses_cart_qty[]=1;

			$ses_cart_items++;
		}
	} else {
		$ses_cart_id[0]=$_GET['id'];
		$ses_cart_name[0]=$_GET['name'];
		$ses_cart_qty[0]=1;

		$ses_cart_items=1;

		session_register("ses_cart_id");
		session_register("ses_cart_name");
		session_register("ses_cart_qty");

		session_register("ses_cart_items");
	}
}

if ($_GET['action']=="delete") {
	array_splice ($ses_cart_id, $item, 1);
	array_splice ($ses_cart_name, $item, 1);
	array_splice ($ses_cart_qty, $item, 1);

	$ses_cart_items--;
}

Any suggestions?

[Weedpacket]

Try registering your session variables before setting their values.

Better yet, take Mordecai's lead and use $_SESSION throughout to refer to your session variables. It makes for more consistent code and you won't have trouble with old values stored in sessions overwriting new values in variables, or worrying about whether or not a session variable has been registered or not: just start_session() and everything's there.

Eg., instead of

 $ses_cart_id[0]=$_GET['id'];
$ses_cart_name[0]=$_GET['name'];
$ses_cart_qty[0]=1;
$ses_cart_items=1;

session_register("ses_cart_id");
session_register("ses_cart_name");
session_register("ses_cart_qty");
session_register("ses_cart_items"); 

you'd have

$_SESSION['ses_cart_id'][0]=$_GET['id'];
$_SESSION['ses_cart_name'][0]=$_GET['name'];
$_SESSION['ses_cart_qty'][0]=1;
$_SESSION['ses_cart_items']=1;

[kdoggy]

Hi,

I have gotten to the point where items are now succesfully saved into the session using the code below. The only problem is it will only save one item, any more items will dissapear when the page is reloaded. Also, I can not delete items permanently, they dissapear like they should but when the page is refreshed they are back again :rolleyes: :mad: 😕

Here is my updated code:

if ($_GET['name']!="") {
   		if (session_is_registered("ses_cart_items")) {
   			$cart_position_counter=0;
			$double=0;

		if ($ses_cart_items>0){
			foreach ($ses_cart_name as $cart_item) {
				if ($cart_item==$_GET['name']) {
					$double=1;
	      	   		$cart_position=$cart_position_counter;
	     	 	}

	    	 	$cart_position_counter++;
	   		}
		}

		if ($double!=1) {
			$ses_cart_id[]=$_GET['id'];
			$ses_cart_name[]=$_GET['name'];
			$ses_cart_qty[]=1;

			$ses_cart_items++;
		}
	} else {
		$ses_cart_id[0]=$_GET['id'];
		$ses_cart_name[0]=$_GET['name'];
		$ses_cart_qty[0]=1;

		$ses_cart_items=1;

		session_register("ses_cart_id");
		session_register("ses_cart_name");
		session_register("ses_cart_qty");

		session_register("ses_cart_items");
	}
}

// Delete items from the cart
if ($_GET['action']=="delete") {
	array_splice ($ses_cart_id, $_GET['item'], 1);
	array_splice ($ses_cart_name, $_GET['item'], 1);
	array_splice ($ses_cart_qty, $_GET['item'], 1);

	$ses_cart_items--;
}

Thanks for help!