get the diffrence array from 2 multidimensional arrays

Question

I have some trouble to get the different array between 2 arrays

Array
(
[0] => Array
    (
        [CR_id] => 107
        [CR_label] => f
        [CR_question_id] => 54
        [CR_correct] => 1
    )

[1] => Array
    (
        [CR_id] => 121
        [CR_label] => C
        [CR_question_id] => 54
        [CR_correct] => 0
    )

)

And my second array

 Array
 (
[0] => Array
    (
        [CR_id] => 107
        [CR_label] => f
        [CR_question_id] => 54
        [CR_correct] => 1
    )

[1] => Array
    (
        [CR_id] => 117
        [CR_label] => B
        [CR_question_id] => 54
        [CR_correct] => 0
    )

[2] => Array
    (
        [CR_id] => 121
        [CR_label] => C
        [CR_question_id] => 54
        [CR_correct] => 0
    )

)

The result i wish to have is this :

Array(
    [0] => Array
    (
        [CR_id] => 117
        [CR_label] => B
        [CR_question_id] => 54
        [CR_correct] => 0
    )
  )

I saw functions like array_diff but I don't know how to apply it there because it's a 2 dimensional arrays. Is there a proper way to do that in a recursive method ?

score 1 · Answer 1 · answered Feb 24 '14 at 19:36

1

You could use array_udiff(), which allows you to define a custom comparison function:

array_udiff($array2, $array1, function(array $a, array $b) {
    return $b['CR_id'] - $a['CR_id'];
});

answered Feb 24 '14 at 19:36

George Brighton

5,131
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27
36

@Downvoter: care to explain? – George Brighton Feb 24 '14 at 19:41
@AmalMurali Then the OP should explicitly specify it in his question. – George Brighton Feb 24 '14 at 19:45
@kingkero: Ah, you're right. I've removed my comment. (this one, too, will be removed after a while) +1 – Amal Murali Feb 24 '14 at 20:16

sergio · Answer 2 · 2014-02-24T20:01:27.167

Simple use array_search and custom function:

Custom function:

function arrayDiffDemensial(&$firstArray, &$secondArray) {
    $resultDiff= array();
    foreach ($firstArray as $key => $value) {
        if (array_search($value, $secondArray) === false) {
           $resultDiff[$key] = $value;
        }
    }
    return $resultDiff;
}

Your arrays:

$firstArray= array(
    array('CR_id' => '107', 'CR_label'=> 'f', 'CR_question_id'=> 54, 'CR_correct'=> 1),
    array('CR_id' => '121', 'CR_label'=> 'C', 'CR_question_id'=> 54, 'CR_correct'=> 0),
);

$secondArray= array(
    array('CR_id' => '107', 'CR_label'=> 'f', 'CR_question_id'=> 54, 'CR_correct'=> 1),
    array('CR_id' => '117', 'CR_label'=> 'B', 'CR_question_id'=> 54, 'CR_correct'=> 0),
    array('CR_id' => '121', 'CR_label'=> 'C', 'CR_question_id'=> 54, 'CR_correct'=> 0),
);

$result = arrayDiffDemensial($secondArray , $firstArray);
var_dump($result);

Result:

 array(1) { [1]=> array(4) { ["CR_id"]=> string(3) "117" ["CR_label"]=> string(1) "B" ["CR_question_id"]=> int(54) ["CR_correct"]=> int(0) } }

What if I want to differentiate by more than one element of the arrays? — kero, Feb 24 '14 at 19:40

score 0 · Accepted Answer · answered Feb 24 '14 at 19:41

0

If you're looking at any difference and not just one value:

$result = array_map('unserialize', array_diff(
    array_map('serialize', $array2), array_map('serialize', $array1)));

print_r($result);

answered Feb 24 '14 at 19:41

AbraCadaver

78,200
7
66
87

get the diffrence array from 2 multidimensional arrays

3 Answers3