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