How to generate XML file dynamically using PHP?

// Create a new DOMDocument object
$xmlDoc = new DOMDocument();

// Create the root element
$root = $xmlDoc->createElement("employees");
$xmlDoc->appendChild($root);

// Create a new employee element with attributes and child nodes
$employee = $xmlDoc->createElement("employee");
$employee->setAttribute("id", "1");
$name = $xmlDoc->createElement("name", "John Doe");
$age = $xmlDoc->createElement("age", "35");
$employee->appendChild($name);
$employee->appendChild($age);
$root->appendChild($employee);

// Output the XML as a string
$xmlString = $xmlDoc->saveXML();

// Set the HTTP Content-Type header to indicate that we're sending XML
header("Content-Type: text/xml");

// Output the XML string to the browser
echo $xmlString;