Merge two sub arrays

Question

What is the best way to merge two arrays which contain sub arrays? Is there an function to do this and is it possible to do that without using loop? I have tried using function array_merge_recursive, but it's not doing what I need.

These are example arrays:

array1 = [
  [0] => [person] => [
    'name' => 'John'
  ],
  [1] => [person] => [
    'name' => 'Arya'
  ]
]

array2 = [
  [0] => [person] => [
    'surname' => 'Snow'
  ],
  [1] => [person] => [
    'surname' => 'Stark'
  ]
]

What I need:

array3 = [
  [0] => [person] => [
    'name' => 'John'
    'surname' => 'Snow'
  ],
  [1] => [person] => [
    'name' => 'Arya'
    'surname' => 'Stark'
  ]
]

But with above mentioned function I am getting array with 4 elements, two names and two surnames.

Answer 1

Use array_map with array_merge:

$array3 = array_map('array_merge', $array1, $array2);

array_map calls a function on the corresponding elements of each of the input arrays. Then array_merge combines those sub-arrays.