Does anyone know a tutorial where this is explained??

[28rain]

Basically im newish to php and im having a go at making a cart, and i have already made the infastructure of the other tables. The cart tutorials are really unclear to me so does anybody know a decent tuorial or explanation to this line of code...

<a href="cart.php?action=add_item&id=<?php echo $row["itemId"]; ?>&qty=1">Add Item</a>

 

Thanks ???

[Maq]

Looks like when someones clicks on that link it sends them to the processing page (cart.php) where it's going to add the item that they selected ($_GET['id']) with the quantity of 1 ($_GET['qty']).

 

It's utilizing the GET method.

 

The link is generated dynamically, and the value for the URL parameter 'id' is generated from the results of the query to the database.

[28rain]

So where's the id going to be added to? Is it adding to the session? And what about all the ? e.g cart.php?action

 

[dadamssg]

the question marks seperates the file from the variables being set via the url...cart.php is the same as cart.php?

 

the variables are set via $_GET['variable']....so the 'action' variable is set to Add_item...the &'s seperate each variable and what they're set to...the file(cart.php) pulls those variables out of the url and uses them in the script.

[Maq]

The skeleton of your script probably looks something like this.  So first let me explain how it's being generated.

 

$sql = "SELECT * FROM items";
$result = mysql_query($sql) or die(mysql_error());
while($row = mysql_fetch_assoc($result)) {
?>
&qty=1">Add Item
}
?>

 

Your script queries the database and grabs all of the unique ID's for the items and assigns 'id' to it.  The '?' and '&' characters are how you append these values to the URL.  '?' is used for the very first one, and any additional values you must use the '&' symbol.

 

If you go to the cart.php page, and look for 'add_item', which is the action you're taking when you get there, then you will see $_GET['id'] and $_GET['qty'] which will be used to add that item to the customers cart (session or DB) with the quantity of 1.