Updating a multidimensional array in laravel

Question

I need some help on how to update a multidimensional array in PHP. I am using the following array to update a grid of images. The number of my images varies.First I upload and resize my images and then save them in the images field as Json in database.I set the image size to 300 by default and save it in thumb field. This my json images field that i store it in database:

[
  {
    "images": {
      "300": "/storage/uploads/300.1.png",
      "600": "/storage/uploads/600.1.png",
      "900": "/storage/uploads/900.1.png",
      "original": "/storage/uploads/1.png"
    },
    "thumb": "/storage/uploads/300.1.png"
  },
  {
    "images": {
      "300": "/storage/uploads/300.2.png",
      "600": "/storage/uploads/600.2.png",
      "900": "/storage/uploads/900.2.png",
      "original": "/storage/uploads/2.png"
    },
    "thumb": "/storage/uploads/300.2.png"
  },
  {},
  {}
]

For example, suppose I want to edit the size of the second image and change it from 300 to 600.This is the request log I get from the edit form.

array:3 [▼
  "_token" => "wZSerggegrgL1lcbhWZFwerfwerfwerfVx"
  "_method" => "patch"
  "imagesThumb" => array:4 [▼
    "/storage/uploads/300.1.png" => "/storage/uploads/300.1.png"
    "/storage/uploads/300.2.png" => "/storage/uploads/600.2.png"
    "/storage/uploads/300.3.png" => "/storage/uploads/300.3.png"
    "/storage/uploads/300.4.png" => "/storage/uploads/300.4.png"
  ]
]

How do I update the thumb of the second image?

Reza · Accepted Answer · 2021-01-02 19:58:11Z

1

You can use below solution. It was done by playing with array_flip() function. Replace address_to_json_file with the address of your json data.

$request = [
    "/storage/uploads/files/2020/ads/images/300_2020_12_25_26b48.1.png" => "/storage/uploads/files/2020/ads/images/300_2020_12_25_26b48.1.png",
    "/storage/uploads/files/2020/ads/images/300_2020_12_25_12567.2.png" => "/storage/uploads/files/2020/ads/images/600_2020_12_25_12567.2.png",
    "/storage/uploads/files/2020/ads/images/300_2020_12_25_6da51.4.png" => "/storage/uploads/files/2020/ads/images/300_2020_12_25_6da51.4.png",
    "/storage/uploads/files/2020/ads/images/300_2020_12_25_65509.png"   => "/storage/uploads/files/2020/ads/images/300_2020_12_25_65509.png",
];
$sample_json = json_decode(address_to_json_file, true);

for ($i = 0; $i < count($request); $i++) {
    $flipped_arr = array_flip($sample_json[$i]['images']);
    foreach ($flipped_arr as $new_key => $original_key) {
        if (!empty($request[$new_key]) && $new_key != $request[$new_key]) {
            $sample_json[$i]['images'] = $request[$new_key];
        }
    }
}

dd($sample_json);

edited Jan 2, 2021 at 19:58

Reza

196 bronze badges

answered Dec 31, 2020 at 17:11

BABAK ASHRAFI

4,3114 gold badges26 silver badges35 bronze badges

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11 Comments

Reza Over a year ago

What do you mean by address_to_json_file? You mean the array that is the database. @babak-ashrafi

BABAK ASHRAFI Over a year ago

Yes. The json data. I spent some minutes on solving your question, please don't waste it.

Reza Over a year ago

i have error => json_decode() expects parameter 1 to be string, array given

Reza Over a year ago

i tried this code but doesn't work. and $sample_json is the same data in database and thumb never changed.` $sample_json = $advertisement->images; for ($i = 0; $i < count($inputs['imagesThumb']); $i++) { $flipped_arr = array_flip($sample_json[$i]['images']); foreach ($flipped_arr as $new_key => $original_key) { if (!empty($request[$new_key]) && $new_key != $request[$new_key]) { $sample_json[$i]['images'][$original_key] = $request[$new_key]; } } } dd($sample_json); `

Reza Over a year ago

i log this code dd(!empty($request[$new_key]) && $new_key != $request[$new_key]); before if and returns false.

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