(PHP 7 >= 7.2.0)
DOMNamedNodeMap::count — Get number of nodes in the map
public DOMNamedNodeMap::count ( ) : int
Gets the number of nodes in the map.
This function has no parameters.
Returns the number of nodes in the map, which is identical to the length property.
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https://www.php.net/manual/en/domnamednodemap.count.php