php代码 数组转xml

 //生成xml格式数据
    public function ToXml($array)
    {
        if (!is_array($array) || count($array) <= 0) {
            return;
        }
        $xml = '<xml version="1.0">';
        foreach ($array as $key => $val) {
            if (is_numeric($val)) {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
            } else {
                $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
            }
        }
        $xml .= "</xml>";
        return $xml;
    }