在 HTML 代碼中圍繞字符串包裝 HTML 標記

Question

我正在使用 PHP 7.3+。 我想在我的 HTML 代碼中的每個字母周圍包裝不同的 HTML 標簽，但只在文本周圍，而不是其他 HTML 標簽。 例如：

<!doctype html>

<html lang="en">
<head>
  <meta charset="utf-8">

  <title>The HTML5 Herald</title>
  <meta name="description" content="The HTML5 Herald">
  <meta name="author" content="SitePoint">

  <link rel="stylesheet" href="css/styles.css?v=1.0">

</head>

<body>
  <h1>This is the first heading</h1>
  <p>Some Paragraph</p>
  <ul>
    <li>List item 1</li>
    <li>List item 2</li>
  </ul>
  <script src="js/scripts.js"></script>
</body>
</html>

我基本上想將<span class="customclass"></span>包裹在網站文本的每個字母周圍。 哪個是：

This is the first heading
Some Paragraph
List item 1
List item 2

這是預期的 output：

 <!doctype html>

<html lang="en">
<head>
  <meta charset="utf-8">

  <title>The HTML5 Herald</title>
  <meta name="description" content="The HTML5 Herald">
  <meta name="author" content="SitePoint">

  <link rel="stylesheet" href="css/styles.css?v=1.0">

</head>

<body>
  <h1><span class="customclass">T</span><span class="customclass">h</span><span class="customclass">i</span><span class="customclass">s</span> <span class="customclass">i</span><span class="customclass">s</span> <span class="customclass">t</span><span class="customclass">h</span><span class="customclass">e</span> <span class="customclass">f</span><span class="customclass">i</span><span class="customclass">r</span><span class="customclass">s</span><span class="customclass">t</span> <span class="customclass">h</span><span class="customclass">e</span><span class="customclass">a</span><span class="customclass">d</span><span class="customclass">i</span><span class="customclass">n</span><span class="customclass">g</span></h1>
  <p><span class="customclass">S</span><span class="customclass">o</span><span class="customclass">m</span><span class="customclass">e</span> <span class="customclass">P</span><span class="customclass">a</span><span class="customclass">r</span><span class="customclass">a</span><span class="customclass">g</span><span class="customclass">r</span><span class="customclass">a</span><span class="customclass">p</span><span class="customclass">h</span></p>
  <ul>
    <li><span class="customclass">L</span><span class="customclass">i</span><span class="customclass">s</span><span class="customclass">t</span> <span class="customclass">i</span><span class="customclass">t</span><span class="customclass">e</span><span class="customclass">m</span> <span class="customclass">1</span></li>
    <li><span class="customclass">L</span><span class="customclass">i</span><span class="customclass">s</span><span class="customclass">t</span> <span class="customclass">i</span><span class="customclass">t</span><span class="customclass">e</span><span class="customclass">m</span> <span class="customclass">2</span></li>
  </ul>
  <script src="js/scripts.js"></script>
</body>
</html>

我有這個正則表達式，但它只是把它包裹在最后兩個詞上，我需要的是每個字母：

preg_replace('/\b[\w\'-]+\W+\K.*\S/s', '<span class="customclass">$0</span>', $html);

PHP 怎么可能？

Answer 1

此代碼獲取 HTML 文檔的正文，然后遞歸查找元素和這些元素中的文本。 如果找到，它將每個字母包裝在一個跨度標簽中。

這支持自定義標簽，並且只影響文檔<body>中的 HTML。

$string ='<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>The HTML5 Herald</title>
  <meta name="description" content="The HTML5 Herald">
  <meta name="author" content="SitePoint">
  <link rel="stylesheet" href="css/styles.css?v=1.0">
</head>
<body>
  <h1>This is the first heading</h1>
  <p>Some Paragraph</p>
  <ul>
    <li>List item 1</li>
    <li>List item 2</li>
  </ul>
  <script src="js/scripts.js"></script>
</body>
</html>';


$previous_value = libxml_use_internal_errors(TRUE);
$dom = new DOMDocument();
$dom->loadHTML($string);
$body = $dom->getElementsByTagName('body')->item(0);

foreach ($body->getElementsByTagName('*') as $element) {
    replaceText($element);
}

$html = html_entity_decode($dom->saveHTML());

libxml_clear_errors();
libxml_use_internal_errors($previous_value);

function replaceText(DOMNode $node) {
    if ($node instanceof DOMText) {
        $newString = '';
        foreach(str_split($node->nodeValue) as $char) {
            if (!trim($char)) {
                continue;
            }
            $newString .= sprintf('<span class="customclass">%s</span>', $char);
        }
        $node->nodeValue = $newString;
        return $node;
    }
    if ($node->hasChildNodes()) {
        foreach($node->childNodes as $childNode) {
            return replaceText($childNode);
        }
    }
}

Output：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>The HTML5 Herald</title>
  <meta name="description" content="The HTML5 Herald">
  <meta name="author" content="SitePoint">
  <link rel="stylesheet" href="css/styles.css?v=1.0">
</head>
<body>
  <h1><span class="customclass">T</span><span class="customclass">h</span><span class="customclass">i</span><span class="customclass">s</span><span class="customclass">i</span><span class="customclass">s</span><span class="customclass">t</span><span class="customclass">h</span><span class="customclass">e</span><span class="customclass">f</span><span class="customclass">i</span><span class="customclass">r</span><span class="customclass">s</span><span class="customclass">t</span><span class="customclass">h</span><span class="customclass">e</span><span class="customclass">a</span><span class="customclass">d</span><span class="customclass">i</span><span class="customclass">n</span><span class="customclass">g</span></h1>
  <p><span class="customclass">S</span><span class="customclass">o</span><span class="customclass">m</span><span class="customclass">e</span><span class="customclass">P</span><span class="customclass">a</span><span class="customclass">r</span><span class="customclass">a</span><span class="customclass">g</span><span class="customclass">r</span><span class="customclass">a</span><span class="customclass">p</span><span class="customclass">h</span></p>
  <ul>
  <li><span class="customclass">L</span><span class="customclass">i</span><span class="customclass">s</span><span class="customclass">t</span><span class="customclass">i</span><span class="customclass">t</span><span class="customclass">e</span><span class="customclass">m</span><span class="customclass">1</span></li>
    <li><span class="customclass">L</span><span class="customclass">i</span><span class="customclass">s</span><span class="customclass">t</span><span class="customclass">i</span><span class="customclass">t</span><span class="customclass">e</span><span class="customclass">m</span><span class="customclass">2</span></li>
  </ul>
  <script src="js/scripts.js"></script>
</body>
</html>

在 HTML 代碼中圍繞字符串包裝 HTML 標記

問題描述

1 個解決方案

解決方案1
0 已采納 2020-05-16 13:27:22

在 HTML 代碼中圍繞字符串包裝 HTML 標記

問題描述

1 個解決方案

解決方案1 0 已采納 2020-05-16 13:27:22

解決方案1
0 已采納 2020-05-16 13:27:22