Merge 2D array into another 2D array with different structure

Question

I have 2 multidimensional arrays. I need to merge the content from the second array into first array.

First array consists of dates and/or some urls.

array:2 [
  0 => array:3 [
    0 => array:2 [
      "startDate" => "2022-01-01"
      "endDate" => "2022-01-31"
    ]
    1 => array:2 [
      "startDate" => "2022-02-01"
      "endDate" => "2022-02-28"
    ]
    2 => array:4 [
      "startDate" => ""
      "endDate" => ""
      "bannerUrl" => "https://commons.wikimedia.org/wiki/File:Red_rose_flower_detailed_imge.jpg"
      "imageTarget" => "image Target"
    ]
  ]
  1 => array:1 [
    0 => array:2 [
      "startDate" => "2022-01-01"
      "endDate" => "2022-01-15"
    ]
  ]
]

Second array consists of image objects.

array:2 [
  0 => array:2 [
    0 => array:1 [
      "image" => {"image A object...."}
    ]
    1 => array:1 [
      "image" => {"image B object...."}
    ]
  ]
  1 => array:1 [
    0 => array:1 [
      "image" => {"image C object...."}
    ]
  ]
]

I need output like this where image from second array is passed to first array.

array:2 [
      0 => array:3 [
        0 => array:2 [
          "startDate" => "2022-01-01"
          "endDate" => "2022-01-31"
          "image" => {"image object...."}
        ]
        1 => array:2 [
          "startDate" => "2022-02-01"
          "endDate" => "2022-02-28"
          "image" => {"image object...."}
        ]
        2 => array:4 [
          "startDate" => ""
          "endDate" => ""
          "bannerUrl" => "https://commons.wikimedia.org/wiki/File:Red_rose_flower_detailed_imge.jpg"
          "imageTarget" => "image Target"
        ]
      ]
      1 => array:1 [
        0 => array:2 [
          "startDate" => "2022-01-01"
          "endDate" => "2022-01-15"
          "image" => {"image object...."}
        ]
      ]
    ]

This is code, I have tried.

foreach ($items as $key => $item) {
    for ($i = 0; $i < count($item); ++$i) {
        $executionArray[$key][$i] = $item[$i];
        if (isset($files[$key])) {
            if (isset($executionArray[$key][$i])) {
                $executionArray[$key][$i]['image'] = $files[$key][$i]['image'];
            }
        }
    }
}

But I am only getting Undefined array key 2.

Please always present your array/object data as the output from `var_export()` so that contributors can instantly use it. — mickmackusa, Aug 17 '22 at 22:37

mickmackusa · Answer 1 · 2022-08-17T23:34:34.097

Iterate only on the second array.
Keep track of the first and second level keys which relate the data between the two arrays.
Push the new associative element (image object) into the first array.

Code: (Demo)

foreach ($array2 as $i1 => $rows) {
    foreach ($rows as $i2 => $row) {
        $array1[$i1][$i2] += $row;
    }
}
var_export($array1);

Output:

array (
  0 => 
  array (
    0 => 
    array (
      'startDate' => '2022-01-01',
      'endDate' => '2022-01-31',
      'image' => 
      (object) array(
         '0' => 'image A object....',
      ),
    ),
    1 => 
    array (
      'startDate' => '2022-02-01',
      'endDate' => '2022-02-28',
      'image' => 
      (object) array(
         '0' => 'image B object....',
      ),
    ),
    2 => 
    array (
      'startDate' => '',
      'endDate' => '',
      'bannerUrl' => 'https://commons.wikimedia.org/wiki/File:Red_rose_flower_detailed_imge.jpg',
      'imageTarget' => 'image Target',
    ),
  ),
  1 => 
  array (
    0 => 
    array (
      'startDate' => '2022-01-01',
      'endDate' => '2022-01-15',
      'image' => 
      (object) array(
         '0' => 'image C object....',
      ),
    ),
  ),
)

Kender Tas · Answer 2 · 2022-08-17T22:01:22.450

-1

Maybe you can use array_merge inside the foreach loop.

$out = array();
foreach ($arr1 as $key => $value){
    $out[] = (object)array_merge((array)$arr2[$key], (array)$value);
}
print_r($out)

Source.

edited Aug 17 '22 at 22:01

answered Aug 11 '22 at 15:54

Kender Tas

1
4

Welcome to SO! Please don't post link-only answers but summarize the linked content or its relevant parts a little. A link may become invalid or outdated and in that case, your answer would be useless in the future. – ahuemmer Aug 16 '22 at 08:31
If another page provides the required resolving advice, please flag to close as a duplicate instead of answering. – mickmackusa Aug 17 '22 at 22:37
This answer is [provably incorrect](https://3v4l.org/bH0EX). Please test your code before posting an answer. – mickmackusa Aug 17 '22 at 23:35

Merge 2D array into another 2D array with different structure

2 Answers2