PHP How to create another array from one array

Question

I have main array:

$data_cities = Array ( 

[0] => Array ( 
    [_type] => _items_city_sorting [item_city_sorting] => Moscow 
) 
[1] => Array (
    [_type] => _items_city_sorting [item_city_sorting] => Saint-Petersburg 
) 
[2] => Array ( 
    [_type] => _items_city_sorting [item_city_sorting] => Sochi 
) )

I want to make another array just like:

$cities = array (
[1] => 'Moscow',
[2] => 'Saint-Petersburg',
[3] => 'Sochi' )

The function that I use returns only the last value

  if ( $data_cities ) {
    foreach ( $data_cities as $key => $city ) {
      $cities[ $city->$key+1 ] = $city['item_city_sorting'];
    }
  }

Array ( [1] => Sochi )

What am I doing wrong? Thanks for the help=)

The main array was obtained using Carbon Fields if this is important

When looking at that duplicate, there are various methods which work for different versions of PHP, the latest way would be to use [array_column()](http://php.net/manual/en/function.array-column.php) — Nigel Ren, Aug 14 '18 at 07:25
I do also, but in the final array, only the last value is returned) — , Aug 14 '18 at 07:38
Try changing `[ $city->$key+1 ]` to `[]` (also make sure you initialise the array before hand) — Nigel Ren, Aug 14 '18 at 07:42

score 0 · Answer 1 · answered Aug 14 '18 at 07:56

0

As you want the number of the key+1 just use this term inside your foreach:

$cities[ $key+1 ] = $city['item_city_sorting'];

answered Aug 14 '18 at 07:56

Marvin Fischer

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score 0 · Answer 2 · answered Aug 14 '18 at 08:03

You can try following inside your foreach:

$cities[] = $city['item_city_sorting'];
 or
array_push($cities,$city['item_city_sorting']);

Add the value dynamically into your city array

For example

if ( $data_cities ) {
 foreach ( $data_cities as $key => $city ) {
  $cities[] = $city['item_city_sorting'];
 }
}

PHP How to create another array from one array

2 Answers2