Add keys to values that don't already have keys in array PHP

Question

Given the fallowing array $array:

Array
 (
  [1] => Array
    (
        [0] => 267
        [location_id_keep] => 261
    )
  [2] => Array
    (
        [0] => 266
        [location_id_keep] => 262
    )
  [3] => Array
    (
        [0] => 2669
        [1] => 2670
        [location_id_keep] => 2668
    )
  [4] => Array
    (
        [0] => 266
        [1] => 2670
        [location_id_keep] => 2668
    )
  )

I want to add to the each arrays values that doesn't have the [location_id_keep] key the fallowing key: [location_id_delete] so that I will get this output:

Array

(

[1] => Array
    (
        [location_id_delete] => 267
        [location_id_keep] => 261
    )

[2] => Array
    (
        [location_id_delete] => 266
        [location_id_keep] => 262
    )
[3] => Array
    (
        [location_id_delete] => [2669, 2670]
        [location_id_keep] => 2668
    )

[4] => Array
    (
        [location_id_delete] => [266, 2670]
        [location_id_keep] => 2668
    )
)

Is there any method to add keys inside array assigned to already existing values that doesn't have a key ?

Your desired output is not valid; PHP arrays cannot have more than one element with the same key. — Nick
– Nick, Commented Sep 5, 2019 at 9:18
Its wrong [location_id_delete] => 2669 [location_id_delete] => 2670 should be,for example, [location_id_delete] => [2669,2670] — splash58
– splash58, Commented Sep 5, 2019 at 9:18
Something like this [location_id_delete] => [2669, 2670] etc — bt19
– bt19, Commented Sep 5, 2019 at 9:19

LF-DevJourney · Accepted Answer · 2019-09-05 09:35:33Z

3

This should works, but I suggest you shourld reconstruct the structure of your data. Demo

foreach($arrays as &$array){
    if($array["location_id_keep"]){
        $temp_array["location_id_keep"] = $array["location_id_keep"];
        unset($array["location_id_keep"]);
    }
    $count = count($array);
    if($count == 1) {
        $temp_array["location_id_delete"] = current($array);
    }elseif($count > 1){
        $temp_array["location_id_delete"] = array_values($array);
    }
    $array = $temp_array;
}

answered Sep 5, 2019 at 9:35

LF-DevJourney

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Comments

Rahul · Accepted Answer · 2019-09-05 09:43:58Z

Here is the snippet,

array_walk($arr, function (&$v) {
    // keeping location_id_keep aside to perform operation of replacing keys
    $temp = array_diff_key($v, ['location_id_keep' => '']);
    if (!empty($temp)) {
        // getting the count of sub arrays other than location_id_keep
        $cnt = count($temp);
        foreach ($temp as $key => $value) {
            // if one record then directly assign data
            if ($cnt == 1) {
                $v['location_id_delete'] = $value;
            } else{ // assign multiple data in an arrat
                $v['location_id_delete'][] = $value;
            }
            // unset numeric index or other than location_id_keep
            unset($v[$key]);
        }
    }
});

array_walk — Apply a user-supplied function to every member of an array
array_diff_key — Computes the difference of arrays using keys for comparison

Demo

Output:-

Array
(
    [1] => Array
        (
            [location_id_keep] => 261
            [location_id_delete] => 267
        )

    [2] => Array
        (
            [location_id_keep] => 262
            [location_id_delete] => 266
        )

    [3] => Array
        (
            [location_id_keep] => 2668
            [location_id_delete] => Array
                (
                    [0] => 2669
                    [1] => 2670
                )

        )

    [4] => Array
        (
            [location_id_keep] => 2668
            [location_id_delete] => Array
                (
                    [0] => 266
                    [1] => 2670
                )

        )

)

Vaibhavi S. · Accepted Answer · 2019-09-05 09:45:52Z

This will Works

  foreach($newArray as $key => $val){
            if(array_key_exists('location_id_keep',$val)){
                $array[$key]['location_id_keep'] = $val['location_id_keep'];
                unset($val['location_id_keep']);
            }
            $count = count($val);
            if($count>1){
                 $array[$key]['location_id_delete'] = implode(',',$val);
            }else{
                $array[$key]['location_id_delete'] = $val[0];
            }       
        }

OUTPUT

Array
(
    [1] => Array
        (
            [location_id_keep] => 261
            [location_id_delete] => 267
        )

    [2] => Array
        (
            [location_id_keep] => 262
            [location_id_delete] => 266
        )

    [3] => Array
        (
            [location_id_keep] => 2668
            [location_id_delete] => 2669,2670
        )

    [4] => Array
        (
            [location_id_keep] => 2668
            [location_id_delete] => 266,2670
        )

)

splash58 · Accepted Answer · 2019-09-05 09:49:39Z

1

Functional solution

foreach($arrays as &$array){
    // get numeric key items 
    $temp = array_filter($array, 'is_numeric',ARRAY_FILTER_USE_KEY);
    // remove them from array and return under new key
    $array = array_diff($array, $temp) + ['location_id_delete'=>$temp];
}

demo

answered Sep 5, 2019 at 9:49

splash58

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Comments

Rakesh Jakhar · Accepted Answer · 2019-09-05 09:53:12Z

1

You can use foreach with implode and unset

  foreach($a as $k => &$v){
    $location = $v['location_id_keep'];
    unset($v['location_id_keep']);
    $r[] = [
      'location_id_delete' => implode(',',$v), 
      'location_id_keep'   => $location
    ];
  }

Live example : https://3v4l.org/kqCVH

answered Sep 5, 2019 at 9:53

Rakesh Jakhar

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Comments

MH2K9 · Accepted Answer · 2019-09-05 09:57:19Z

1

You can try using array_walk() and array_filter(). array_filter is to filtering the values who's key is number (you mean location_id_delete here).

$array = [[0 => 267, 'location_id_keep' => 261],[0 => 266, 'location_id_keep' => 262],[0 => 2669, 1 => 2670, 'location_id_keep' => 2668], [0 => 266, 1 => 2670, 'location_id_keep' => 2668]];

array_walk($array, function (&$val) {
    $val = [
       'location_id_delete' => array_filter($val, 'is_numeric', ARRAY_FILTER_USE_KEY), 
       'location_id_keep' => $val['location_id_keep']
    ];
});

print_r($array);

Working demo.

edited Sep 5, 2019 at 9:57

answered Sep 5, 2019 at 9:36

MH2K9

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