Explode each values of Array element

Question

I have an array like :

Array
(
   [2] => 2,6
   [3] => 1
   [4] => 14
   [5] => 10
   [6] => 8
)

I want to explode each element of an array and return a new array using array_map, so that I can avoid using loop, and creating extra function to call back.

O/p should be like :

  Array
(
[2] => Array
    (
        [0] => 2
        [1] => 6
    )

[3] => Array
    (
        [0] => 1
    )

[4] => Array
    (
        [0] => 14
    )

[5] => Array
    (
        [0] => 10
    )

[6] => Array
    (
        [0] => 8
    )

)

Culex

So where are you stuck with using array_map()? Also you know that at the end array_map will also loop over your array. – Undersell

avoid using loop, and creating extra function to call back - array_map also uses callback function as its first argument – Corinacorine

avoid using loop, and creating extra function to call back - Means , as we have function explode already , so not to create other function – Culex

Related: Split Values in Array Using Explode to form Multidimensional Array and Make an element in array explode – Johiah

Answer 1

You can use

$result = array_map(function($val) {
    return explode(',', $val);
}, $input);

Which will result in

Array
(
    [2] => Array
        (
            [0] => 2
            [1] => 6
        )

    [3] => Array
        (
            [0] => 1
        )

    [4] => Array
        (
            [0] => 14
        )

    [5] => Array
        (
            [0] => 10
        )

    [6] => Array
        (
            [0] => 8
        )

)

This will work on PHP >= 5.3 with support for anonymous functions.

Fulminant

Answer 2

You can also do

$result = array_map('str_getcsv', $input);

This will also result in

Array
(
    [2] => Array
        (
            [0] => 2
            [1] => 6
        )

    [3] => Array
        (
            [0] => 1
        )

    [4] => Array
        (
            [0] => 14
        )

    [5] => Array
        (
            [0] => 10
        )

    [6] => Array
        (
            [0] => 8
        )

)

Chadburn

Answer 3

Try following code

$newArr = array_map(function($val, $key){
    return explode(",", $val);
}, $arr);

Rawley

Answer 4

$data = array(2 => '2,6',3 => '1',4 => '14',5 => '10',6 => '8');

foreach($data as $key => $val) {
    $new = explode(',',$val);
    $data[$key] = $new;
}
$output = $data;

echo '<pre>';
print_r($output);

Muttra

I dont want any extra loops, as we have array_map – Culex

While this code snippet may solve the question, including an explanation really helps to improve the quality of your post. Remember that you are answering the question for readers in the future, and those people might not know the reasons for your code suggestion. Please also try not to crowd your code with explanatory comments, as this reduces the readability of both the code and the explanations! – Coco