Update Array without adding a new row

NZ_Kiwis

		$ID = $_GET['ID'];
		$cart = $_SESSION['cart'];
    foreach ($cart as $row) {
		  if($row['ItemID'] == $ID){
		  $QntyC = $_GET['Qnty'];
		  $Qnty = $row['Qnty'];
		          if ($QntyC == 'Min') {
              $Qnty = $row['Qnty'] - 1;
              } else {
              $Qnty = $row['Qnty'] + 1; 
              }
  $_SESSION['cart'][] = array('ItemID' => $ID, 'Name' => $row['Name'], 'Qnty' => $Qnty, 'Size' => $row['Size'], 'Color' => $row['Color'], 'NZD' => $row['NZD']);
		  }
		  }

I want this to update the Qnty but it adds a new row.... does the basic forumla okay

dagon

$_SESSION['cart'][]

should be

$_SESSION['cart'][$ID] = array( 'Name' => $row['Name'], ....

use the item id as the key for the array since they will never be able to order the item twice

NZ_Kiwis

Just changed it to this.

              }
  $_SESSION['cart'][$ID] = array('Name' => $row['Name'], 'Qnty' => $Qnty, 'Size' => $row['Size'], 'Color' => $row['Color'], 'NZD' => $row['NZD']);
		  }

But it did the same thing, i've got a new row which has 2 and not 1 but the older row with 1 is still there....

NZ_Kiwis

Hold on more testing shows it will add a second row only, for the first row shows 1 then the next row till be 2 then 3 then 4 then back to 3 if requested... why on the first time does it not update but add a new row

dagon

you would have to start with an empty session and the initial $cart = $_SESSION['cart']; would have to point to the correct array

NZ_Kiwis

So you mean like this?

		$ID = $_GET['ID'];
		$newcart = $_SESSION['cart'];
		unset($_SESSION['cart']);

foreach ($newcart as $row) {

	  $QntyC = $_GET['Qnty'];
	  $Qnty = $row['Qnty'];

	          if ($QntyC == 'Min') {
          $Qnty = $row['Qnty'] - 1;
          } else {
          $Qnty = $row['Qnty'] + 1; 
          }


  $_SESSION['cart'] = array('ItemID' => $ID, 'Name' => $row['Name'], 'Qnty' => $Qnty, 'Size' => $row['Size'], 'Color' => $row['Color'], 'NZD' => $row['NZD']);

	  }

NZ_Kiwis

...