What is the difference between nested XML tags and directories in PHP parsing?

Nested XML tags refer to XML elements that are contained within other elements, creating a hierarchical structure. This is similar to directories in a file system where directories can contain other directories or files. When parsing XML in PHP, it is important to handle nested tags properly to access the data within them. This can be done using PHP's SimpleXML extension to navigate through the XML structure and extract the desired information.

$xml = <<<XML
<root>
    <parent>
        <child>Value</child>
    </parent>
</root>
XML;

$doc = new SimpleXMLElement($xml);
$value = $doc->parent->child;
echo $value;