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Update Shopping Cart


makamo66
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If you were working on a PHP shopping cart using SESSION variables for the cart item's product id and quantity, how would you update the cart if the same product were chosen? If the same product id was posted, how would you add the quantities and show just the same product?

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I'm doing something like that. My quantity is updating when I add the same product but I need to delete the product that's the last item in the SESSION array. So far I've tried array_pop and unset but I can't get rid of the non-updated product.

These two don't work to remove the last product added to the session:

unset($_SESSION["cart_item"]["element_id"]);
array_pop($_SESSION["cart_item"]);

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30 minutes ago, makamo66 said:

I'm doing something like that

Doesn't sound like you are doing anything like that.

In my code, if the product isn't in the cart it adds it, with the quantity. If the product is already in the cart it updates the quantity.

No removals required (unless, of course, the user wants to cancel)

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This is what I'm using and it's not working:

foreach($cart_items as $item) {
foreach($item["id"] as $key => $val) {
foreach($item["quantity"] as $i => $value) {
if ($key == $i){    
if(empty($item["quantity"])){
  $item["quantity"] = $value;
} elseif (isset($_REQUEST["quantity_$i"]) ) {
$item["quantity"] = $value + $_REQUEST["quantity_$i"];
$value = $item["quantity"];
 echo "Same product";
}}}}
 
 

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It looks to me that your making things harder than they should be. Here's what I would do for a cart array:

	<?php 
	$cart_items = array("pants"=>"3", "shirt"=>"4",  "shoe"=>"5", "banana"=>"13",  "hat"=>"1"); 
	foreach ($cart_items as $item => $quantity){ 
	    echo "Item name is ".$item." and he wants this amount ".$quantity."\n"; 
	}
	?> 
Edited by NotSunfighter
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And I'd remove objects from the array like this

	<?php 
	$cart_items = array("pants"=>"3", "shirt"=>"4",  "shoe"=>"5", "banana"=>"13",  "hat"=>"1"); 
	 
	if (($key = array_search('4', $cart_items)) !== false) {
	    unset($cart_items[$key]);
	}
	 
	foreach ($cart_items as $item => $quantity){ 
	    echo "Item name is ".$item." and he wants this amount ".$quantity."\n"; 
	}
	?> 
	

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