Group a multidimensional array by a Key value?

Question

I have an multi dimensional array i am trying to group the array based on the key value.

So, I'm trying to group them by key but i am not getting to group the array based on the key values.

Below is the original array

 Array
    (
        [0] => Array
            (
                [User] => Array
                    (
                        [id] => 2
                        [feature] => AddUser
                        [feature_level] => 1
                        [parent_feature] => 1
                    )

            )

        [1] => Array
            (
                [User] => Array
                    (
                        [id] => 3
                        [feature] => EditUser
                        [feature_level] => 1
                        [parent_feature] => 1
                    )

            )

        [2] => Array
            (
                [Candidate] => Array
                    (
                        [id] => 5
                        [feature] => AddCandidate
                        [feature_level] => 1
                        [parent_feature] => 4
                    )

            )

        [3] => Array
            (
                [Candidate] => Array
                    (
                        [id] => 6
                        [feature] => EditCandidate
                        [feature_level] => 1
                        [parent_feature] => 4
                    )

            )

    )

What i need is

   Array (

   [User] => Array (
          [0] => Array (
                    [id] => 2
                    [feature] => AddUser
                    [feature_level] => 1
                    [parent_feature] => 1
                    )
          [1] => Array (
                    [id] => 3
                    [feature] => EditUser
                    [feature_level] => 1
                    [parent_feature] => 1
                    )
          )

   [Candidate] => Array (
          [0] => Array (
                    [id] => 5
                    [feature] => AddCandidate
                    [feature_level] => 1
                    [parent_feature] => 4
                 )

          [1] => Array (
                    [id] => 5
                    [feature] => EditCandidate
                    [feature_level] => 1
                    [parent_feature] => 4
                 )
          )

)

Ali · Accepted Answer · 2016-07-14 06:28:57Z

2

Here is a solution with demo. Might help you:

// $myArr is your origional array.
$result_arr = [];

array_walk($myArr,function($v,$k) use (&$result_arr){
   $result_arr[key($v)][] = $v[key($v)]; 
});

print_r($result_arr);

Click Here for Demo

answered Jul 14, 2016 at 6:28

Ali

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Comments

BeetleJuice · Accepted Answer · 2016-07-14 07:03:45Z

1

If your initial array is called $source, this should do it:

$result =[]; //final array
foreach($source as $data){
    $type = key($data); //eg: 'Candidate' or 'User'
    if(!isset($result[$type])) $result[$type]=[];
    $result[$type][] = reset($data);
}

Demo here

edited Jul 14, 2016 at 7:03

answered Jul 14, 2016 at 6:19

BeetleJuice

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4 Comments

0015 Over a year ago

User and Candidate values fetched from the db is dynamic it is like parent feature and add,edit are like child feature need to map w.r.t parent and child

BeetleJuice Over a year ago

You mean there can be more user-types thans 'User' and 'Candidate' ? Meaning you could also have 'Admin', or 'Mods'...

0015 Over a year ago

yes and it may also have like User->adduser,User->viewUser->viewResume. Wt to do in this case where Parent is User its child is View User and view users child is viewresume. What to do in this case

BeetleJuice Over a year ago

Cool. I rewrote my solution to remove hard-coded strings.

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