Searches for all elements with given local tag name

# DOMDocument::getElementsByTagName

(PHP 5, PHP 7, PHP 8)

DOMDocument::getElementsByTagName — Searches for all elements with given local tag name

### 说明

public function DOMDocument::getElementsByTagName(string `$qualifiedName`): DOMNodeList

This function returns a new instance of class DOMNodeList containing all the elements with a given local tag name.

### 参数

`qualifiedName`

  The local name (without namespace) of the tag to match on. The special value `*` matches all tags.

### 返回值

A new DOMNodeList object containing all the matched elements.

### 示例

示例 #1 Basic Usage Example

    <?php
    $xml = <<< XML
    <?xml version="1.0" encoding="utf-8"?>
    <books>
     <book>Patterns of Enterprise Application Architecture</book>
     <book>Design Patterns: Elements of Reusable Software Design</book>
     <book>Clean Code</book>
    </books>
    XML;

    $dom = new DOMDocument;
    $dom->loadXML($xml);
    $books = $dom->getElementsByTagName('book');
    foreach ($books as $book) {
        echo $book->nodeValue, PHP_EOL;
    }
    ?>

以上示例会输出：

    Patterns of Enterprise Application Architecture
    Design Patterns: Elements of Reusable Software Design
    Clean Code

### 参见

- DOMDocument::getElementsByTagNameNS() - Searches for all elements with given tag name in specified namespace

`↑` and `↓` to navigate • `Enter` to select • `Esc` to close • `/` to open