(PHP 5, PHP 7, PHP 8)
The number of nodes in the list. The range of valid child node
indices is 0 to length - 1
inclusive.
版本 | 说明 |
---|---|
8.0.0 | DOMNodeList implements IteratorAggregate now. Previously, Traversable was implemented instead. |
7.2.0 | The Countable interface is implemented and returns the value of the length property. |