PHP: group array of objects by id, while suming up object values

Question

I'm having a hard time manipulating an array of objects in PHP. I need to group the objects by id, while summing up the points.

Starting array of objects:

[
  {
    "id": "xx",
    "points": 25
  },
  {
    "id": "xx",
    "points": 40
  },
  {
    "id": "xy",
    "points": 40
  },
]

What I need:

[
  {
    "id": "xx",
    "points": 65
  },
  {
    "id": "xy",
    "points": 40
  },
]

As a frontender, I'm having a hard time with object/array manipulations in PHP. Any help would be greatly appreciated!

Answer 1

i hope this answer help you first i will change objects to array and return the result to array again

 $values =[
  [
    "id"=> "xx",
    "points"=> 25
  ],
  [
    "id"=> "xx",
    "points"=> 40
  ],
  [
    "id"=> "xy",
    "points"=> 40
  ],
];
$res  = array();
foreach($values as $vals){
  if(array_key_exists($vals['id'],$res)){
    $res[$vals['id']]['points']    += $vals['points'];
    $res[$vals['id']]['id']        = $vals['id'];
  }
  else{
    $res[$vals['id']]  = $vals;
  }
}
$result = array();
foreach ($res as $item){
  $result[] = (object) $item;
}

output enter image description here