Combine php array duplicate values

Question

I have a php array that just like this:

Array
(
    [0] => Array
        (
            [product] => 2
            [price] => 30
            [qnty] => 1
        )
    [1] => Array
        (
            [product] => 2
            [price] => 30
            [qnty] => 1
        )
    [2] => Array
        (
            [product] => 1
            [price] => 250
            [qnty] => 1
        )
)

and I want to combine the duplicate values, add "qnty" index value and print that array like this:

Array
(
    [0] => Array
        (
            [product] => 2
            [price] => 30
            [qnty] =>2
        )
    [1] => Array
        (
            [product] => 1
            [price] => 250
            [qnty] => 1
        )
)

How can i combine this array. Please help me

Iterate over the array, check for duplicate items of the current, if so, remove the duplicates and increase qnty — kero
– kero, Commented Dec 4, 2013 at 11:52

Ram Sharma · Accepted Answer · 2013-12-04 12:26:04Z

1

try the code below. I am assuming the your array name is $products

$merged = array();
  foreach($products as $product) {
  $key = $product['product'];

  if(!array_key_exists($key, $merged)) {
      $merged[$key] = $product;
  }
  else {
      $merged[$key]['qnty'] += $product['qnty'];
  }
}
 echo '<pre>';
 print_r($merged);
 exit;

answered Dec 4, 2013 at 12:26

Ram Sharma

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1 Comment

Linesh jose Over a year ago

hi, Thanks for the code. but i getting this error: Warning: array_key_exists(): The first argument should be either a string or an integer

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