通过PHP中对象值的总和对多维数组进行排序

Question

I have the below multi dimensional array of products. Each array is a pair of products that make a product set, I need to order the multi dimensional array by the total price of each product set.

array(4) {
  [0]=>
  array(2) {
    ["product1"]=>
    object(stdClass)#5075 (2) {
      ["product_id"]=>
      string(4) "9416"
      ["price"]=>
      string(6) "110.00"
    }
    ["product2"]=>
    object(stdClass)#5077 (2) {
      ["product_id"]=>
      string(4) "9431"
      ["price"]=>
      string(6) "100.00"
    }
  }
  [1]=>
  array(2) {
    ["product1"]=>
    object(stdClass)#5065 (2) {
      ["product_id"]=>
      string(4) "1254"
      ["price"]=>
      string(6) "75.00"
    }
    ["product2"]=>
    object(stdClass)#5067 (2) {
      ["product_id"]=>
      string(4) "9431"
      ["price"]=>
      string(6) "62.00"
    }
  }
  [2]=>
  array(2) {
    ["product1"]=>
    object(stdClass)#5055 (2) {
      ["product_id"]=>
      string(4) "9416"
      ["price"]=>
      string(6) "45.00"
    }
    ["product2"]=>
    object(stdClass)#5057 (2) {
      ["product_id"]=>
      string(4) "9431"
      ["price"]=>
      string(6) "50.00"
    }
  }
  [3]=>
  array(2) {
    ["product1"]=>
    object(stdClass)#5045 (2) {
      ["product_id"]=>
      string(4) "9416"
      ["price"]=>
      string(6) "60.00"
    }
    ["product2"]=>
    object(stdClass)#5047 (2) {
      ["product_id"]=>
      string(4) "9431"
      ["price"]=>
      string(6) "25.00"
    }
  }
}

I need to sort the multi-dimensional array by the total sum of product1 + product2 in each array in ascending order. For example [1] should be above [0] as 75+62 is less than 110 +100.

If anyone can help me with this it would be greatly appreciated.

Answer 1

You can use usort() for this purpose:-

function comparePrice($a,$b)
{
  $a_price = $a['product1']->price + $a['product2']->price;
  $b_price = $b['product1']->price + $b['product2']->price;
  if ($a_price ==$b_price) return 0;
  return ($a_price<$b_price)? -1:1;
}
usort($array,'comparePrice');

A hardcoded working example:- https://3v4l.org/mTfu6