PHP check if "multidimensional array(array([key]=>value))" values are empty

Question

I have this array I am posting in Laravel from my view to my controller, and I am trying to check if there is any values inside the array. The array is initialized and sent to the view and inside the view I have a table with inputs to fill, if the user doesn't fill the table and submits the form, the array will come back as following:

Array
(
[51] => Array
    (
        [5] => 
        [2] => 
        [8] => 
    )

[78] => Array
    (
        [18] => 
        [23] => 
        [21] => 
    )
)

for clarification and communication:

array(
   [key1]=>array
           (
              [key1_1]=>value
           )
)

and I want to check if all of value are empty or not which they are in this example, it would be something similar to empty($array) for 1 dimensional arrays.

I have tried array_filter() but it doesn't serve if the value is inside a key inside a key inside an array.

I know I can use foreach to enter to key1 and then foreach again to enter key1_1 and recursively check if the value is null or not and return false and break the loop whenever a value is not null.

But is there any other way or a method in PHP that allows checking those values? something similar to empty($array) but goes inside the array and checks value only? or something that has the logic of empty(array_filter(array_filter($array)))?

or there is no other way except recursively check each value manually by using foreach?

NOTE: I am using Laravel 5.5, PHP 7.1.9

NOTE: I am not trying if find a specific value is null, I am asking if there is a built-in method in PHP or a simpler method than the one I use to check if the values are all null or not.

Is it explicitly always a two dimensional array, or could it be more or less nested than that? — deceze
– deceze ♦, Commented May 30, 2018 at 15:09
@deceze it is explicitly always two dimensional array as in the example, it will never be more or less nested than that — Abed Rawas
– Abed Rawas, Commented May 30, 2018 at 15:25

deceze · Accepted Answer · 2018-05-30 15:28:23Z

5

array_map('array_filter', $array) will remove all inner empty values, bringing the array to something like:

[
    51 => [],
    78 => [
        18 => 'not empty'
    ]
]

Then array_filter that again to remove all empty arrays. In summary:

if (!array_filter(array_map('array_filter', $array))) {
    echo 'The array is completely empty';
}

answered May 30, 2018 at 15:28

deceze♦

525k89 gold badges806 silver badges954 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

The fourth bird · Accepted Answer · 2018-05-30 15:13:35Z

1

One way to do this could be to use array_reduce and pass an empty array as the start value. Then in the callback function use array_merge.

At the end you could use array_filter to remove the empty entries and then count the items in the final array.

$arrays = [
    51 => [
        5 => "",
        2 => "",
        8 => "77"
    ],
    78 => [
        18 => "",
        23 => "99",
        21 => ""
    ]
];

$result = array_reduce($arrays, function($carry, $item) {
    $carry = array_merge($carry, $item);
    return $carry;
}, []);

Test with all empty values

Test with values

edited May 30, 2018 at 15:13

answered May 30, 2018 at 15:08

The fourth bird

165k16 gold badges61 silver badges75 bronze badges

1 Comment

Abed Rawas Over a year ago

your solution works, but I am gonna mark @deceze 's answer as the correct one since it is more accurate with less lines.

tim · Accepted Answer · 2018-05-30 15:57:00Z

-1

This should work if you are only trying to get the number of empty slots in an array.

$myArray = ["bob", "fred", "bill", "mary", "", "jane", ""];

$count = 0;
foreach($myArray as $key=>$value) {


if(!$value) {
$count++;
}


}
echo $count;

edited May 30, 2018 at 15:57

answered May 30, 2018 at 15:08

tim

7471 gold badge10 silver badges12 bronze badges

1 Comment

deceze Over a year ago

empty should be replaced with !$value here. Don't use empty where a boolean test will do.

Collectives™ on Stack Overflow

PHP check if "multidimensional array(array([key]=>value))" values are empty

3 Answers 3

Comments

1 Comment

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related