How can PHP developers effectively extract content from HTML tags recursively?

When extracting content from HTML tags recursively in PHP, developers can use the DOMDocument class to parse the HTML and extract the desired content. By traversing the DOM tree using recursion, developers can extract content from nested HTML tags efficiently. 

function extractContent($node) {
    $content = '';

    if ($node->nodeType === XML_TEXT_NODE) {
        $content .= $node->nodeValue;
    } else {
        foreach ($node->childNodes as $child) {
            $content .= extractContent($child);
        }
    }

    return $content;
}

$html = '<div><p>Hello, <strong>world</strong>!</p></div>';
$dom = new DOMDocument();
$dom->loadHTML($html);

$content = extractContent($dom->documentElement);
echo $content; // Output: Hello, world!

Keywords

PHP DOMDocument DOMXPath recursion HTML tags

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