如何从多维数组中仅获取数组值

Question

I am doing project in laravel. I am fetching a value from database in user1 variable.

foreach($users1 as $us){
                    $uss[$i] = $us->city_id;
                    $users2[$i] = DB::table('provider_city')->select('provider_id')->where('city_id','=', $uss[$i])->get();
                    $i++;
                }
return $users2;

when I return user2, I am getting [[{"provider_id":"14785"}],[{"provider_id":"125478"}]] such values.

I want only values like ['14785','125478'].

I know this may be very simple. Give suggestions.

Answer 1

This can be achieved with json_decode, like so

$json= '[
    {
      "provider_id": "14785"
    },
    { 
      "provider_id": "125478"
    }
  ]';

$jsonDecoded = json_decode($json);
foreach($jsonDecoded as $item)
{
    //Do something with it, e.g
    echo $item->provider_id;
}

Edit: Upon finding out that this is a multidimensional array

This question here should point you in the right direction.