preg_replace_callback错误中的正则表达式。 PHP

时间：2021-05-16 16:50:13

I am trying to create a web application that will convert any selected webpage into a form of simple english. I have a word for word translation stored in a My_SQL database. I have this code so far. It works but only seems to do what i want it too in a few tags and not the whole page. I think this may be due to a regex error?

我正在尝试创建一个Web应用程序,将任何选定的网页转换为简单的英文形式。我有一个单词翻译存储在My_SQL数据库中。到目前为止我有这个代码。它可以工作,但似乎只在一些标签而不是整个页面中做我想要的。我想这可能是由于正则表达式错误?

<?
    $English = array();
    $Simple = array();
    $con = mysqli_connect("localhost","root","root","Words");
    $getmodels = mysqli_query($con, "SELECT * FROM Wordsweb");
    while($res = mysqli_fetch_assoc($getmodels)) {
        $English[] = $res['English'];
        $Simple[] = $res['Simple'];
    }
    $url = $_GET['url'];
    $string = file_get_contents($url);
    $text_to_echo =  preg_replace_callback(
        "/(<([^.]+)>)([^<]+)(<\\/\\2>)/s", 
        function($matches) use ($English, $Simple) {
            /*
             * Indexes of array:
             *    0 - full tag
             *    1 - open tag, for example <h1>
             *    2 - tag name h1
             *    3 - content
             *    4 - closing tag
             */
            $matches[3] = strtolower($matches[3]);
            $text = str_replace($English, $Simple, $matches[3]);
            return $matches[1].$text.$matches[4];
        }, 
        $string
    );
    echo "<base href=\"" . $url . "/\" />";
    echo $text_to_echo;
    ?>

1 个解决方案

#1

1  

You can use DOM+Xpath to fetch and change the text nodes inside an HTML document:

您可以使用DOM + Xpath来获取和更改HTML文档中的文本节点:

$html = <<<'HTML'
  <html>
    <body>
      <h1>Hello World!</h1>
      <div>
        <p>Lorem Ipsum...</p>
      </div>
    </body>
  </html>
HTML;

$dom = new DOMDocument();
$dom->loadHtml($html);
$xpath = new DOMXPath($dom);

$nodes = $xpath->evaluate("//text()");
foreach ($nodes as $node) {
  $node->nodeValue = strToUpper($node->nodeValue);
}

echo $dom->saveHtml();

#1

1  

You can use DOM+Xpath to fetch and change the text nodes inside an HTML document:

您可以使用DOM + Xpath来获取和更改HTML文档中的文本节点:

$html = <<<'HTML'
  <html>
    <body>
      <h1>Hello World!</h1>
      <div>
        <p>Lorem Ipsum...</p>
      </div>
    </body>
  </html>
HTML;

$dom = new DOMDocument();
$dom->loadHtml($html);
$xpath = new DOMXPath($dom);

$nodes = $xpath->evaluate("//text()");
foreach ($nodes as $node) {
  $node->nodeValue = strToUpper($node->nodeValue);
}

echo $dom->saveHtml();
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