array_filter on deep multidimensional arrays

Question

I have an array as such:

$d = [
    0 => [
        0 => 'lorem',
        1 => 'dorem',
        3 => '',
        4 => 'ipsum'
    ],
    1 => [
        0 => 'test',
        1 => 'rere',
        3 => '',
        4 => 'youp'
    ]
];

My issue is that I need to remove empty values from the array. How would I go about using array_filter in removing such empty keys/values from the multidimensional array? I have over 162 sets of arrays totaling 62 each, so this problem is via a large data set.

2 levels only? Try `array_map('array_filter', $d)`. For more nested levels you can use pointers or recursive functions. — user1597430, Aug 28 '19 at 20:27
you are a genius. please post as answer so that i can accept. — Zach Smith, Aug 28 '19 at 20:29

user1597430 · Accepted Answer · 2019-08-28T20:43:05.197

0

For 2D arrays this method will work: array_map('array_filter', $d);

For more nested levels you can use pointers or recursive functions:

$result = clean($d);

function clean($array)
{
    foreach ($array as $index => $item)
    {
        if (is_array($item))
        {
            $array[$index] = clean($item);
        }

        if (!$array[$index])
        {
            unset($array[$index]);
        }
    }

    return $array;
}

edited Aug 28 '19 at 20:43

answered Aug 28 '19 at 20:31

user1597430

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thoughts on how to reformat array keys in numerical order after such changes to the array? – Zach Smith Aug 29 '19 at 14:24
@Zach Smith, for 2D array: `array_map('array_values', $d);` – user1597430 Aug 29 '19 at 14:57

score 0 · Answer 2 · answered Aug 29 '19 at 00:18

0

Use array_filter like this, demo

foreach($d as &$array){
    $array = array_filter($array);
}
var_dump($d);

answered Aug 29 '19 at 00:18

LF00

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array_filter on deep multidimensional arrays

2 Answers2