Duplicate within array

Brusca

Hi Guys,
I have built a shopping cart which creates a session array and adds items to an array as they are clicked (product id and quantity) and then displays them as a shopping cart.

A problem I have the client wishes to fix is that if the same item is clicked for example three times then the product is displayed 3 times and not once with the quantity of three.

Is there a way of checking an array for the same productid first and then if it exists in the array have it just add a value to the quantity??

If you need more info let me know and I will be happy to post some code.

Cheers Bruce

drawmack

http://www.php.net/in_array

Brusca

Ok thanks, thats great. Here is my code below.

I have an array named ($bob). Which is all set and when the add to cart is clicked a product ID ($bb) and Quantity ($qty) is added to my array. See below.

array_push($bob,array('quantity' => $qty,'product' => $bb));

Here is my test for testing if the same product ID exists in the array.

if (in_array($bb, $bob)) {
echo "Got it";
} else {
echo "not";
}
array_push($bob,array('quantity' => $qty,'product' => $bb));
}

I test this by adding the same product twice but it returns "not".

I'm not a wizz with arrays sorry.

BuzzLY

$bb is not in the $bob array. It's inside an array that's inside $bob.

you need to create a function that walks through your array to find values:

function deep_in_array($value, $arr) {
  for($i=0; $i <= count($arr); $i++) {
   if (in_array($value, $arr[$i])) {
     return TRUE;
     break;
   }
  }
  return FALSE;
}

Then, instead of calling in_array, use deep_in_array() to check if your $bb value is in there.

In your case, however, I recommend making an associative array of products and their values:

//instead of this, which makes an array of arrays:

array_push($bob,array('quantity' => $qty,'product' => $bb));

// do this instead, making an associative array:

$bob[$bb] = $qty;

// Then, all you have to do to check if a product is in the array, is 
// this (I'm assuming you really don't want to echo "got it" or "not":

if (!array_key_exists($bb, $bob)) { 
  $bob[$bb] = $qty;
}

Make sense?

By the way, notice how my code above is inside [php] tags? Please learn how to use them. It makes it much easier to read your code.

Brusca

Thanks for your reply. Today was my last day on the project and I didn't think I would have time to work in a dif type of array into the code I have allready written.

It would obviously result in cleaner code. But it works so I won't be changing it now.

I managed to loop through my array the way it was and match up values if they were allready in the array and then reset the qty value for that product.

Cheers for your help.