During the development process, we often encounter the need to convert arrays into XML format. At this time, we can use the XML class library of the ThinkPHP framework to achieve this.

First, we need to create an array:

$data?=?array(
????'name'?=>?'張三',
????'age'?=>?'25',
????'sex'?=>?'男'
);

Then, we can convert it to XML format through the following code:

$xml?=?new?\DOMDocument('1.0',?'utf-8');
$root?=?$xml->createElement('data');
$xml->appendChild($root);
array_to_xml($data,?$root);

function?array_to_xml($data,?$root)?{
????foreach($data?as?$key?=>?$value)?{
????????if(is_array($value))?{
????????????$node?=?$root->appendChild($xml->createElement($key));
????????????array_to_xml($value,?$node);
????????}?else?{
????????????$node?=?$root->appendChild($xml->createElement($key,?$value));
????????}
????}
}

DOMDocument# is used here ##Class and createElement() method first creates a root node , and loops through the data in the array, creates nodes and elements, and adds elements into the node.

If the value in the array is still an array, it needs to call itself recursively to create the corresponding nodes and elements.

Finally, you can use the following code to output a string in XML format:

echo?$xml->saveXML();

In this way, you can easily convert the array to XML format. Of course, if you need to convert an XML format string back to an array, you can also use the

Xml::toArray() method provided by the ThinkPHP framework.

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