How to remove empty values from multidimensional array in PHP?

Question

I've been looking a lot of answers, but none of them are working for me.

This is the data assigned to my $quantities array:

Array(
    [10] => Array([25.00] => 1)
    [9] => Array([30.00] => 3)
    [8] => Array([30.00] => 4)
    [12] => Array([35.00] => )
    [1] => Array([30.00] => )
    [2] => Array([30.00] => )
)

I'm looking for a way to remove the subarrays with empty values like [12] [1] and [2] while keeping everything else.

The desired result:

Array(
    [10] => Array([25.00] => 1)
    [9] => Array([30.00] => 3)
    [8] => Array([30.00] => 4)
)

I tried a lot of the functions on the official php docs and none of them worked.

I've used this one:

function array_filter_recursive($array, $callback = null) {
    foreach ($array as $key => & $value) {
        if (is_array($value)) {
            $value = array_filter_recursive($value, $callback);
        } else {
            if ( ! is_null($callback)) {
                if ( ! $callback($value)) {
                    unset($array[$key]);
                }
            } else {
                if ( ! (bool) $value) {
                    unset($array[$key]);
                }
            }
        }
    }
    unset($value);
    return $array;
}

But it only removes the element in the subarrays; I need the subarrays to be removed entirely.

I don't want this:

Array(
    [10] => Array([25.00] => 1)
    [9] => Array([30.00] => 3)
    [8] => Array([30.00] => 4)
    [12] => Array()
    [1] => Array()
    [2] => Array()
)

Answer 1

The following function worked for my case. We can use a simple recursive function to remove all empty elements from the multidimensional PHP array:

function array_filter_recursive($input){
    foreach ($input as &$value){
        if (is_array($value)){
            $value = array_filter_recursive($value);
        }
    }
    return array_filter($input);
}

Then we just need to call this function:

$myArray = array_filter_recursive($myArray);

Answer 2

Not sure if this is exactly what your looking for.

function array_remove_null($array) {
    foreach ($array as $key => $value)
    {
        if(is_null($value))
            unset($array[$key]);
        if(is_array($value))
            $array[$key] = array_remove_null($value);
    }
    return $array;
}

Update (corrections):

function array_remove_null($array) {
    foreach ($array as $key => $value)
    {
        if(is_null($value))
            unset($array[$key]);
        if(is_string($value) && empty($value))
            unset($array[$key]);
        if(is_array($value))
            $array[$key] = array_remove_null($value);
        if(isset($array[$key]) && count($array[$key])==0)
            unset($array[$key]);
    }
    return $array;
}

I'm sure better checking and making this more robust might help the solution.

Answer 3

use array_map() for filter every array in $array:

$newArray = array_map('array_filter', $array);

Here's demo

Answer 4

$newArray = array_map('array_filter', $array);

This sintax it's work and very help full thank's guys ..

Answer 5

Use array_filter with array_map like below:

$arr=array_filter(array_map('array_filter', $arr));

Answer 6

This one worked for me

function array_filter_recursive($input){
    foreach ($input as &$value){
        if (is_array($value)){
            $value = array_filter_recursive($value);
        }
    }
    return array_filter($input);
}

Answer 7

This removes all items with null values recursively on multideminsional arrays. Works on PHP >= 5.6. If you want to remove all "empty" values, replace !is_null($value) with !empty($value).

function recursivelyRemoveItemsWithNullValuesFromArray(array $data = []): array
{
    $data = array_map(function($value) {
        return is_array($value) ? recursivelyRemoveItemsWithNullValuesFromArray($value) : $value;
    }, $data);

    return array_filter($data, function($value) {
        return !is_null($value);
    });
}