从多维数组中求和并合并重复值

Question

I would like to sum the value of movements while keeping an unique value for day on the same array.

The base array:

array (607)
0 => array (2)
    day => "11" (2)
    movements => 1
1 => array (2)
    day => "11" (2)
    movements => 1
2 => array (2)
    day => "11" (2)
    movements => 1
3 => array (2)
    day => "12" (2)
    movements => 1
4 => array (2)
    day => "12" (2)
    movements => 1
5 => array (2)
    day => "12" (2)
    movements => 1

[...]

The result I am expecting (for each day sum movements):

array (607)
    0 => array (2)
        day => "11" (2)
        movements => 3
    1 => array (2)
        day => "12" (2)
        movements => 3    
    [...]

Any help would be greatly appreciated.

Edit: What I have tried so far :

• sum-array-values-of-the-same-key: it also sum daywhich is not what I am expecting.

• my own code:

  $arr1 = $stats['data']['vhc']; // contain ['day'] and ['movements']
  $arr2 = $data['vhc']; // contain ['day'] and ['movements']
  $sum = [];
  
  if (!empty($arr1)) {
      $result = [];
      foreach ($arr1 as $key => $value) {
          if (isset($arr2[$key]['day']) && $arr2[$key]['day'] == $value['day']) {
              $result['day'] = $value['day'];
              $result['movements'] = $value['movements'] + $arr2[$key]['movements'];
          }
          array_push($sum, $result);
      }
  }
  

Answer 1

You can easily do with foreach() and array_values()

$final_array = [];

foreach($array as $arr){
  $final_array[$arr['day']]['day'] = $arr['day'];
  $final_array[$arr['day']]['movements'] = (isset($final_array[$arr['day']]['movements']))? $final_array[$arr['day']]['movements']+$arr['movements'] : $arr['movements'];    
}
$final_array = array_values($final_array);

print_r($final_array);

Output:-https://eval.in/957326