PHP如何从一个数组创建另一个数组

Question

我有主数组：

$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 
) )

我想制作另一个数组，就像：

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

我使用的函数仅返回最后一个值

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

Array ( [1] => Sochi ) 

我在做什么错？感谢您的帮助=）

如果重要的话，可以使用Carbon Fields获得主阵列

Answer 1

只要您想要键+1的数字，只需在foreach中使用以下术语即可：

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

Answer 2

您可以尝试在foreach中进行以下操作：

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

将值动态添加到您的城市数组中

例如

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