Remove related element from multidimensional array in php

Question

I have an array of image data like this:

[other-image] => Array
        (
            [img] => Array
                (
                    [0] => 1526973657.jpg
                    [1] => 1526973661.jpg
                    [2] => 1526973665.jpg
                )

            [path] => Array
                (
                    [0] => ../post-upload/1/
                    [1] => ../post-upload/1/
                    [2] => ../post-upload/1/
                )

            [type] => Array
                (
                    [0] => 1
                    [1] => 1
                    [2] => 1
                )

            [thumb] => Array
                (
                    [0] => thumb_1526973661.jpg
                    [1] => thumb_1526973665.jpg
                    [2] => thumb_1526973668.jpg
                )

        )

Now I want to delete an image and it's all related data from sub arrays. (path, type, thumb data)

This is how I tried it in php:

  $delkey = '1526973657.jpg';
  if(in_array($delkey, $_SESSION['other-image']['img'])){
      $imgkey = array_search($delkey, $_SESSION['other-image']['img']);
      if($imgkey) unset($_SESSION['other-image']['img'][$imgkey]);
  }

But problem is I can't delete related data from other arrays. Can anybody tell me how to do this? Thank you.

Bhaskar Jain · Accepted Answer · 2018-05-22 07:46:16Z

1

You should use !==false after array_search() because it may return first index i.e. 0 in some cases, so your condition will not executed. And regarding delete related data from other arrays, you have to unset other data related to that key.

if($imgkey!==false){
        unset($_SESSION['other-image']['img'][$imgkey]);
        unset($_SESSION['other-image']['path'][$imgkey]);
        unset($_SESSION['other-image']['type'][$imgkey]);
        unset($_SESSION['other-image']['thumb'][$imgkey]);
    }

answered May 22, 2018 at 7:46

Bhaskar Jain

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2 Comments

user3733831 Over a year ago

yes its working. but I cant get the logic.. can you kindly elaborate?

Bhaskar Jain Over a year ago

From php.net/manual/en/function.array-search.php - Returns the key for needle if it is found in the array, FALSE otherwise. In your example, you are searching '1526973657.jpg' and it is on 0 index of the array so array search will return 0. if you write if($imgkey) , it will not go inside if condition so data will not be removed even it existed in the array.

manhmaluc · Accepted Answer · 2018-05-22 07:35:56Z

1

Is the related data has same key with img? If they are same, I think you only need to add some codes to delete other data like the way was used to delete img.

if($imgkey) unset($_SESSION['other-image']['path'][$imgkey]);
if($imgkey) unset($_SESSION['other-image']['type'][$imgkey]);
if($imgkey) unset($_SESSION['other-image']['thumb'][$imgkey]);

answered May 22, 2018 at 7:35

manhmaluc

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Comments

Sharwan Kami · Accepted Answer · 2018-05-22 07:36:31Z

1

If the keys in img sub-array are related with the same key(index) in sub-arrays(path, type and thumb, you can also unset those keys. e.g.

$delkey = '1526973657.jpg';
if(in_array($delkey, $_SESSION['other-image']['img'])){
    $imgkey = array_search($delkey, $_SESSION['other-image']['img']);
    if($imgkey){
        unset($_SESSION['other-image']['img'][$imgkey]);
        unset($_SESSION['other-image']['path'][$imgkey]);
        unset($_SESSION['other-image']['type'][$imgkey]);
        unset($_SESSION['other-image']['thumb'][$imgkey]);
    }
}

answered May 22, 2018 at 7:36

Sharwan Kami

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