Getting Started: 7. Accessing The DOMNode

FluidXML wraps the DOMNode native APIs extending them but without reimplementing what is already convenient to use.

To access the node content after a query we can use the DOMNode own methods.

$chapters = $book->query('//chapter');

Accessing the query result as array or iterating it returns the DOMNode unwrapped.

$last = $chapters->size() - 1;

// Raw DOMNode access.
$chapters[0]->setAttribute('first', '');
$chapters[$last]->setAttribute('last', '');

foreach ($chapters as $i => $chapter) {
        // $chapter is an instance of DOMNode.

        $title = $chapter->nodeValue;
        $id    = $chapter->getAttribute('id');
        $has_first_attr = $chapter->hasAttribute('first');

        if ($has_first_attr) {
                echo "The first chapter has title '{$title}' with id '{$id}'.\n";
        } else {
                $ii = $i + 1;
                echo "Chapter {$ii} has title '{$title}' with id '{$id}'.\n";
        }
}

Pro Tip:
Many DOMNode methods and properties are available like:

• hasAttribute()
• getAttribute()
• nodeValue
• childNodes

See http://php.net/manual/en/class.domnode.php for the reference documentation.

Another way to retrieve the DOMNode instances is using the array() method.

$nodes = $chapters->array();          // Returns an array of DOMNode instances.

8. Namespaces 〉