Implement Countable for DomNodeList and DOMNamedNodeMap (Request #74837)

[blar]

Implement the Interface Countable for DomNodeList and DOMNamedNodeMap (Request #74837)

$document = new DomDocument();
$root = $document->createElement('root');
$document->appendChild($root);
for($i = 0; $i < 5; $i++) {
    $root->setAttribute('attribute-' . $i, 'value-' . $i);
}
for($i = 0; $i < 7; $i++) {
    $item = $document->createElement('item');
    $root->appendChild($item);
}

// Count childnodes
var_dump(count($root->childNodes));
var_dump($root->childNodes->count());
var_dump($root->childNodes->length);

// Count attributes
var_dump(count($root->attributes));
var_dump($root->attributes->count());
var_dump($root->attributes->length);

Does this require a RFC?

[blar]

Contains content of another branch. A clean pull request #2618