collection map laravel

// The array we're going to return
    $data = [];    
// Query the users table
$query = users::where('id', 1)->get();

// Let's Map the results from [$query]
$map = $query->map(
    function($items){
          $data['user_firstName'] = $items->firstName;
          $data['user_lastName'] = $items->lastName;
          return $data;
        }
    );

return $map;// The array we're going to return$data = [];// Query the users table$query = users::where('id', 1)->get();// Let's Map the results from [$query]$map = $query->map(function($items){   $data['user_firstName'] = $items->firstName;   $data['user_lastName] = $items->lastName;   return $data;});return $map;$collection->each(function ($item, $key) {
    hj
});