What are some best practices for manipulating XML data with PHP namespaces?

When manipulating XML data with PHP namespaces, it is important to properly handle and work with namespaces to ensure correct parsing and manipulation of the XML document. One best practice is to use the SimpleXMLElement class in PHP, which provides methods for working with namespaces. Additionally, it is recommended to use the ->children() method to access elements within a specific namespace. 

// Load the XML file
$xml = simplexml_load_file('example.xml');

// Define the namespace
$ns = $xml->getNamespaces(true)['namespace'];

// Access elements within a specific namespace
$items = $xml->children($ns)->item;

// Loop through the items
foreach ($items as $item) {
    // Manipulate the XML data
}

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