php - 如何将多维数组中的所有键转换为 snake_case？

Question

我正在尝试将多维数组的键从 CamelCase 转换为 snake_case，增加了复杂性，有些键有一个我想删除的感叹号。

例如:

$array = array(
  '!AccountNumber' => '00000000',
  'Address' => array(
    '!Line1' => '10 High Street',
    '!line2' => 'London'));

我想转换为:

$array = array(
  'account_number' => '00000000',
  'address' => array(
    'line1' => '10 High Street',
    'line2' => 'London'));

我在现实生活中的数组非常庞大，而且有很多层次。非常感谢任何有关如何解决这个问题的帮助!

Answer 1

这是我使用的修改后的函数，取自 soulmerge 的回复:

function transformKeys(&$array)
{
  foreach (array_keys($array) as $key):
    # Working with references here to avoid copying the value,
    # since you said your data is quite large.
    $value = &$array[$key];
    unset($array[$key]);
    # This is what you actually want to do with your keys:
    #  - remove exclamation marks at the front
    #  - camelCase to snake_case
    $transformedKey = strtolower(preg_replace('/([a-z])([A-Z])/', '$1_$2', ltrim($key, '!')));
    # Work recursively
    if (is_array($value)) transformKeys($value);
    # Store with new key
    $array[$transformedKey] = $value;      
    # Do not forget to unset references!
    unset($value);
  endforeach;
}