(PHP 5, PHP 7)
DOMNamedNodeMap::item — Retrieves a node specified by index
DOMNamedNodeMap::item ( int $index ) : DOMNode
Retrieves a node specified by index within the DOMNamedNodeMap object.
index
Index into this map.
The node at the indexth position in the map, or null if that is not a valid index (greater than or equal to the number of nodes in this map).
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https://www.php.net/manual/en/domnamednodemap.item.php