session help

[raptor30506090]

Hi guys help please

 

foreach($_SESSION['cart'] as $id => $value){

}

 

is this valid?

im getting error

 

Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\shopping cart\new_cart.php on line 48

 

Many thanks

[Adam]

foreach requires an argument that can be iterated through, like an array or object. I'm guessing $_SESSION['cart'] is not being set as you're expecting. Try passing the $_SESSION array into var_dump to see what the cart key is.

[batwimp]

Did you remember to call session_start() at the top of the page?

[raptor30506090]

yes session start is at the  top

[El Chupacodra]

It's most likely what Adam is after - that $_SESSION['cart'] isn't an array.

Check it with gettype() or is_array().

[Jessica]

or var_dump or print_r to see what it contains as well as the type.

[raptor30506090]

ok here is the full code if that helps

 

if(isset($_GET['id'])){
$id = $_GET['id'];

if(isset($_GET['action'])){
$action = $_GET['action'];
}else echo $action="Empty Cart" ;

switch($action){
               case 'add':
		   if(isset($_SESSION['cart'][$id])){
		        $_SESSION['cart'][$id]++;}
		   else $_SESSION['cart'] =1;
		   break;
		   
		   case 'remove':
		   if(isset($_SESSION['cart'][$id])){
		   $_SESSION['cart'][$id]--;
		   if($_SESSION['cart'][$id]==0){
			   unset($_SESSION['cart'][$id]);
			   }
		   }
		   break;
		   
		   case 'delete':
		   unset($_SESSION['cart'][$id]);
		   break;
		   }}

////////////////////////////// Display Shopping Cart /////////////////////////////////
               if(isset($_SESSION['cart'])){
			       $total = 0;
			   foreach($_SESSION['cart'] as $id => $value){
			   }
				   $result = mysql_query("SELECT * FROM products WHERE id=" . $id)or dei(mysql_error());
				   $row = mysql_fetch_array($result);
			       $price = $row['price'];
				   $line_cost = $price * $value;
				   $total = $total+ $line_cost;
				   
			   }print_r($_SESSION['cart']);

[raptor30506090]

full code to pay with 

[raptor30506090]

Any help please i hate posting to my self

[xyph]

You should apply the advice posted in this thread.

 

What displays when you print_r or var_dump $_SESSION immediately before you get the error.

[raptor30506090]

Sorry about that im getting

 

Array ( [cart] => 1 [cart_1] => 1 )

[Jessica]

So, clearly $_SESSION['cart'] is not an array.

The first few lines in your add case might be the problem.

[xyph]

So you understand why your foreach loop was failing then?

 

foreach( 1 as $id => $value )

 

You need to make sure $_SESSION['cart'] is an array before looping through it.

 

 case 'add':
		   if(isset($_SESSION['cart'][$id])){
		        $_SESSION['cart'][$id]++;}
		   else $_SESSION['cart'] =1;
		   break;

is probably the issue.

 

jesi beat me to it.

[Jessica]

Again, cause I am a ninja!

Or just need more stuff to do.

*wanders off*

[xyph]

Possibly, or it could be the fact that my post was more complete?

 

SNAP!

[Jessica]

Possibly, or it could be the fact that my post was more complete?

 

SNAP!

complete, verbose, whichever

[raptor30506090]

ok iv made it array im now getting this

 

Array ( [cart] => 1 )

 

but i still have this

 

Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\shopping cart\new_cart.php on line 49

 

thanks for your help

[xyph]

$_SESSION['cart'] is still 1. 1 is an integer, and can not be looped through using foreach.

 

We've told you where the issue is, it's up to you to ask the right questions, or fix it.

[raptor30506090]

ok as you can see i need help not done this befor so were am i going wrong hope thats the right question

[raptor30506090]

Array ( [cart] => 1 [cart_1] => 7 [cart_] => 4 )

Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\shopping cart\new_cart.php on line 50

 

now im getting this

[Jessica]

Do you know what an array is?

[raptor30506090]

an array can store many items i am very new with this not tryed to do a shopping cart before

[raptor30506090]

$something as $key => $value

[Jessica]

Okay so see how cart = 1? That's not an array. An array would be like

[cart] => Array ( [qty] => 1 [id] => 7)

 

We already told you where the problem is, and another person even posted the section of code that is the problem.

[raptor30506090]

ok but iis it not easy just to tell me how to fix it so i now for next time?