• https://pear.php.net/package/XML_Serializer
• https://stackoverflow.com/questions/856833/is-there-any-way-to-convert-json-to-xml-in-php
• https://www.sitepoint.com/xml-php-pear-xml_serializer/

  安装

  pear install XML_Serializer

  使用

  ```php <?php

function json2xml($json) {

require_once 'XML/Serializer.php';
$serializer_options = [
    'addDecl' => true,
    'addDoctype' => true,
    'doctype' => [
        'id' => 'pubmed api',
        'uri' => 'http://39.106.135.106/pubmed/api/',
    ],
    'encoding' => 'UTF-8',
    'indent' => '  ',
    'rootName' => 'result',
    'mode' => 'simplexml',
];
$Serializer = &new XML_Serializer($serializer_options);
$status = $Serializer->serialize($json);
if (PEAR::isError($status)) {
    die($status->getMessage());
}
header('Content-type: text/xml');
echo $Serializer->getSerializedData();

}

// $data = … json2xml($data); ```