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                # 類摘要 ### 該類是[DOMNode](https://www.php.net/manual/en/class.domnode.php)的屬性childNodes和DOMNode子類的一些方法返回值 ``` class DOMNodeList implements Traversable, Countable { /* 屬性 */ public readonly int $length; /* 方法 */ public count(): int|false public item(int $index): ?DOMNode } ``` ## 屬性readonly 列表中的節點數。有效子節點索引的范圍為0到長度-1(包括長度-1)。 ## 方法: public**DOMNodeList::count**():int|false 返回列表中的節點數,該數目與length屬性相同。 獲取列表中的節點數 public DOMNodeList::item(int $index): ?DOMNode 檢索由索引指定的節點 ### 實例 ~~~ <?php // $document = new DOMDocument(); //添加 $element = $document->appendChild(new DOMElement('div')); // Create a h1 element $text1 = new DOMElement('h1', 'H1標簽'); // Create another h1 elements $text2 = new DOMElement('h2', 'H2標簽'); // Append the nodes $element->appendChild($text1); $element->appendChild($text2); // Get the name of tag of third element echo $document->getElementsByTagName()->length; // echo "<br>"; $document->childNodes->count(); echo "<br>"; var_dump($document->childNodes->item(0)); ~~~
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