Transform $_POST and $_FILES into a better format to deal with

prepare_form.js

function prepare_form() {
        $key = key($_FILES);
        if(!$key)
                return;
        $files = @$_FILES[$key];
        if(@$_POST[$key]) {
                $files = array_merge($files, $_POST[$key]);
                unset($_POST[$key]);
        }
        $ret = [];
        if(is_array($files['name'])) {
                foreach($files as $k => $unused) {
                        foreach($files[$k] as $i => $v) {
                                if(!isset($ret[$i]))
                                        $ret[$i] = [];
                                $ret[$i][$k] = $v;
                        }
                }
        }
        else
                $ret = [$files];
        $_FILES = $ret;
}

What about including it on https://github.com/clamiax/tinycore?