将字符串从关联数组转换为多维数组

$str = "name=John&age=25&address[city]=New York&address[state]=NY";
parse_str($str, $array);

function convertToMultiDimensionalArray($array) {
    $result = array();
    foreach ($array as $key => $value) {
        if (strpos($key, '[') !== false) {
            $keys = explode('[', str_replace(']', '', $key));
            $temp = &$result;
            foreach ($keys as $k) {
                if (!isset($temp[$k])) {
                    $temp[$k] = array();
                }
                $temp = &$temp[$k];
            }
            $temp = $value;
        } else {
            $result[$key] = $value;
        }
    }
    return $result;
}

$multiDimensionalArray = convertToMultiDimensionalArray($array);

print_r($multiDimensionalArray);