php - 递归删除数组键前缀

Question

我有一个以下格式的数组(每个子数组都有父键作为前缀):

$input = array(
    'seo_text' => array(
        'seo_text_title'       => '',
        'seo_text_description' => '',
        'seo_text_button'      => array(
            'seo_text_button_text' => '',
            'seo_text_button_url'  => '',
            'seo_text_button_new_tab_enabled' => '',
        ),
    ),
);

我想把它转换成下面的格式:

$input = array(
    'seo_text' => array(
        'title'       => '',
        'description' => '',
        'button'      => array(
            'text' => '',
            'url'  => '',
            'new_tab_enabled' => '',
        ),
    ),
);

我正在尝试编写一个递归函数，但它没有按照预期的方式工作。

Answer 1

解决方案:

function removeKeyPrefix(array $array, string $prefix = ''): array
{
    $newArray = [];
    $prefixLength = strlen($prefix);

    foreach ($array as $key => $value) {
        if (substr($key, 0, $prefixLength) === $prefix) {
            $newKey = substr($key, $prefixLength);
        } else {
            $newKey = $key;
        }

        $newArray[$newKey] = is_array($value) ? removeKeyPrefix($value, $key.'_') : $value;
    }

    return $newArray;
}

$input = removeKeyPrefix($input);

Online demo on 3v4l