转换PHP多维数组，以便值成为键，和其他值成为每个键的数组

function transformArray($array) {
    $result = array();
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            foreach ($value as $subValue) {
                if (!isset($result[$subValue])) {
                    $result[$subValue] = array();
                }
                $result[$subValue][] = $key;
            }
        }
    }
    return $result;
}

$array = array(
    'apple' => array('red', 'green'),
    'banana' => array('yellow'),
    'orange' => array('orange', 'yellow')
);

$result = array(
    'red' => array('apple'),
    'green' => array('apple'),
    'yellow' => array('banana', 'orange'),
    'orange' => array('orange')
);