翻转关联数组并将新值存储在子数组中以防止丢失重复值 [英] Flip associative array and store new values in subarrays to prevent losing duplicated values

问题描述

我有一个可能包含重复值的平面关联数组.

I have a flat associative array which may contain duplicate values.

Array (
    [for-juniors] => product_category 
    [for-men] => product_category
    [coats] => product_category
    [for-women] => product_category
    [7-diamonds] => brand
) 

我需要重构数据以将原始值存储为新键，并将原始键推送到与新键关联的子数组中.

I need to restructure the data to store the original values as new keys and the original keys pushed into subarrays associated with the new keys.

array(
    'product_category' => array(
        'for-juniors',
        'for-men',
        'coats',
        'for-women'
    ),
    'brand' => array(
        '7-diamonds'
    )
);

推荐答案

$grouped = array();
foreach ($input as $choice => $group) {
    $grouped[$group][] = $choice;
}

var_dump($grouped);

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