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Array to xml, why not work, return a bunch of strings, concatenated completely without 

//xml
    protected function arrayToXml($arr)
    {
        $xml = "<xml>";
        foreach ($arr as $key => $val) {
            if (is_numeric($val)) {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
            } else {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
            }
        }
        $xml .= "</xml>";
        return $xml;
    }
. Array to xml, why not work, return a bunch of strings, concatenated completely without
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Publish Time
2023-02-28 21:17
Update Time
2023-02-28 21:17

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