clear empty spaces array [duplicate]

Question

I have this array, and I want go get rid of those indexes that have no value in them, so for example in the index[0] I want to get rid of the [0] and [4] so I would have a 3 value array and so on...

Array
(
    [0] => Array
        (
            [0] => 
            [1] => 
            [2] => 7
            [3] => 
            [4] => 8
            [5] => 
        )

    [1] => Array
        (
            [0] => 
            [1] => 
            [2] => 9
            [3] => 10
            [4] => 
        )

    [2] => Array
        (
            [0] => 
            [1] => 11
            [2] => 12
            [3] => 
        )

)

Also, do you want to preserve the keys, or shift them? That is to say, should element[0][1] be 1 or 2 after the operation? — bytesized
– bytesized, Commented Sep 5, 2015 at 21:02

curtis1000 · Accepted Answer · 2015-09-05 21:46:58Z

1

This is a good use case for array_filter. Checking for !empty() allows you to remove both empty strings and null values.

$filter_func = function($input) {
    $output = [];
    foreach ($input as $set) {
        $output[] = array_values(
            array_filter($set, function($element) {
                return !empty($element);
            })
        );
    }
    return $output;
}

edited Sep 5, 2015 at 21:46

answered Sep 5, 2015 at 21:15

curtis1000

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5 Comments

Cesar Mtz Over a year ago

it worked but how could i set the inner values as [0] or [1] instead of the values of the previous array? Array ( [0] => Array ( [2] => 7 [4] => 8 ) [1] => Array ( [2] => 9 [3] => 10 ) [2] => Array ( [1] => 11 [2] => 12 ) )

curtis1000 Over a year ago

I just updated my solution. You would wrap the array_filter call with array_values.

Cesar Mtz Over a year ago

Thanks so much man!! it did worked!

Cesar Mtz Over a year ago

this is removing 0s in my array is there a way to avoid that? [0] => Array ( [0] => 0 [1] => 0 [2] => 7 [3] => 0 [4] => 8 [5] => 0 ) @curtis1000

curtis1000 Over a year ago

It's hard for me to know what the best filter is without knowing the range of possibilities that you want to accept. If you are always dealing with integers, you could replace the "!empty" with "is_int" to only accept integers (including zeros).

CollinD · Accepted Answer · 2015-09-05 21:01:04Z

1

foreach ($array as $key=>$value) {
  if ($value == '') { unset($array[$key]); }
}

That should do it.

answered Sep 5, 2015 at 21:01

CollinD

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Comments

tmarois · Accepted Answer · 2015-09-05 21:34:23Z

0

You can use array_filter()

$my_array = array_filter($my_array);

If you need to "re-index" after, you can run $my_array = array_values($my_array)

Example:

$a   = array();
$a[] = '';
$a[] = 1;
$a[] = null;
$a[] = 2;
$a[] = 3;

$a = array_filter($a);
print_r($a);

Output:

Array
(
    [1] => 1
    [3] => 2
    [4] => 3
)

edited Sep 5, 2015 at 21:34

answered Sep 5, 2015 at 21:26

tmarois

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2 Comments

Cesar Mtz Over a year ago

i have tried with this one an it didn't work for me

tmarois Over a year ago

Oh. well array_filter works, but I didn't realize you are running a multidimensional array, because that won't work within the deeper array levels unless you did them manually.

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