Search and summation of array elements [duplicate]

There is an array

`Array (
 [0] => Array (
     [item] => Array (
           [id] => 55 
           [count] => 4 
           )
     )
 [1] => Array (
     [item] => Array (
           [id] => 15 
           [count] => 1 
           )
     )
 [2] => Array (
     [item] => Array (
           [id] => 55 
           [count] => 12 
           )
     )
 [3] => Array (
     [item] => Array (
           [id] => 15 
           [count] => 6 
           )
     )
)`

You need to iterate over the array in php. Find duplicates by id and add the count column in them

For example, you need to make it work

`Array (
 [0] => Array (
     [item] => Array (
           [id] => 55 
           [count] => 16 
           )
     )
 [1] => Array (
     [item] => Array (
           [id] => 15 
           [count] => 7 
           )
     )
)`

I can’t figure out how to do it. I hope for the help of experts!