PHP array count values and output new array

Question

I have a PHP array that looks like this...

Array
(
    [item1] => Array
        (
            [0] => 1
            [1] => 1
            [2] => 1
        )

    [item2] => Array
        (
            [0] => 1
            [1] => 1
            [2] => 1
            [3] => 1
            [4] => 1
            [5] => 2
        )

)

I am trying to count the values and output a new array that looks like this...

Array
(
    [item1] => Array
        (
            [1] => 3
        )

    [item2] => Array
        (
            [1] => 5
            [2] => 1
        )
)

I have tried to get the count by doing this...

print_r(array_count_values($myarray));

But this is not working for me, is there a way to count the values and creaye the new array all in one statement?

array_count_values works on one array. You have an array of arrays. You need some sort of loop here. Hint: array_map… — deceze
– deceze ♦, Commented Jan 31, 2020 at 15:42

BadHorsie · Accepted Answer · 2020-01-31 16:00:46Z

2

You're on the right track, but you need to apply array_count_values() to each subarray, not the parent array.

$arr = [
    'item1' => [1, 1, 3],
    'item2' => [1, 1, 1, 2, 1],
    'item3' => [1, 2, 2, 2, 3, 3, 3, 3, 3, 3]
];

$totals = array_map('array_count_values', $arr);

print_r($totals);

Results in

Array
(
    [item1] => Array
        (
            [1] => 2
            [3] => 1
        )

    [item2] => Array
        (
            [1] => 4
            [2] => 1
        )

    [item3] => Array
        (
            [1] => 1
            [2] => 3
            [3] => 6
        )

)

answered Jan 31, 2020 at 16:00

BadHorsie

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Comments

u_mulder · Accepted Answer · 2020-01-31 15:55:43Z

1

So, as @deceze advised - it is:

// applying `array_count_values` to each element of `$array`
print_r(array_map('array_count_values', $array));

answered Jan 31, 2020 at 15:55

u_mulder

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2 Comments

fightstarr20 Over a year ago

Thanks, works perfectly. How would I go about making this a new array instead of just outputting it with print_r?

BadHorsie Over a year ago

@fightstarr20 Just assign the result to a new variable $newArray = array_map('array_count_values', $initialArray);

devpro · Accepted Answer · 2020-01-31 15:59:27Z

1

You have array into an another array, it means you can't use array_count_values() with this way, either use array_map() or use foreach and save data into one another array like:

<?php
$array = array(
      'item1'=>array(1,1,1),
      'item2'=>array(1,1,1,1,1,2)
  );

$newArray = array(); // your new array
foreach ($array as $key => $value) {
  $newArray[$key] = array_count_values($value);
}
echo "<pre>";
print_r($newArray);
?>

Result:

Array
(
    [item1] => Array
        (
            [1] => 3
        )

    [item2] => Array
        (
            [1] => 5
            [2] => 1
        )

)

answered Jan 31, 2020 at 15:59

devpro

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