Remove duplicate value in multidimensional arrays

Question

I have an multidimensional array like this

I am not able to remove multiple url values Want to remove duplicate url values... How to remove duplicate multidimensional array?

Did you try http://php.net/manual/fr/function.array-unique.php ? — Mario Radomanana, Feb 25 '15 at 13:44
Duplicate of http://stackoverflow.com/questions/307674/how-to-remove-duplicate-values-from-a-multi-dimensional-array-in-php — GluePear, Feb 25 '15 at 13:50
This question is incomplete and unclear. You have offered no coding attempt and there is no desired output. No one can confidently answer this question. — mickmackusa, Nov 06 '18 at 13:35

B001ᛦ · Answer 1 · 2020-04-28T16:05:37.797

I guess you need this function:

 function super_unique($array)
    {
      $result = array_map("unserialize", array_unique(array_map("serialize", $array)));

      foreach ($result as $key => $value)
      {
        if ( is_array($value) )
        {
          $result[$key] = super_unique($value);
        }
      }

      return $result;
    }

    $a = [['foo', 'bar'], ['foo', 'bar'], ['foo', 'bar_foo']];

    print_r(super_unique($a));

Outcome is:

Array
(
    [0] => Array
        (
            [0] => foo
            [1] => bar
        )

    [2] => Array
        (
            [0] => foo
            [1] => bar_foo
        )

)

score -1 · Answer 2 · answered Feb 25 '15 at 13:53

As the array is multidimensional you will need to loop through the items, and keep a list of which video URLs you have, and create a new array containing only the unique items, for example:

$unique_video_urls = array();
foreach($array as $id => $subarray) {
    foreach($subarray as $video) {
        if(!in_array($video['url'], $unique_video_urls)) {
            $unique_video_urls[] = $video['url'];
            $new_array[$id][] = $video;
        }
    }
}

$array is your original array.

In this example $new_array should look like your original array, but only containing unique items. The array keys from the original array have been retained, assuming they have some meaning to you?

Hopefully this is a starting point for you to use to process the array as you need.

Remove duplicate value in multidimensional arrays

2 Answers2