PHP DOM 解析器：查找所有链接的文本并更改它

Question

我是 PHO DOM 解析器的新手。我有一个像这样的字符串：

$coded_string = "Hello, my name is <a href="link1">Marco</a> and I'd like to <strong>change</strong> all <a href="link2">links</a> with a custom text";

并且我想使用自定义字符串更改链接中的所有文本（在示例中，Marco 和链接），比如 < em>你好。

我怎样才能在 PHP 上做到这一点？目前我只将 XDOM/XPATH 解析器初始化为：

$dom_document = new DOMDocument();      
$dom_document->loadHTML($coded_string);
$dom_xpath = new DOMXpath($dom_document);

Answer 1

您对 xpath 在这里有很好的了解，下面的示例展示了如何选择所有 textnode 子节点 (DOMText^Docs) 的 元素并更改其文本：

$dom_document = new DOMDocument();      
$dom_document->loadHTML($coded_string);
$dom_xpath = new DOMXpath($dom_document);

$texts = $dom_xpath->query('//a/child::text()');
foreach ($texts as $text)
{
    $text->data = 'hello';
}

让我知道这是否有帮助。

Answer 2

尝试 phpQuery ( http://code.google.com/p/phpquery/ )：

<?php

    $coded_string = 'Hello, my name is <a href="link1">Marco</a> and I\'d like to <strong>change</strong> all <a href="link2">links</a> with a custom text';

    require('phpQuery.php');

    $doc = phpQuery::newDocument($coded_string);
    $doc['a']->html('hello');
    print $doc;

?>

打印:

Hello, my name is <a href="link1">hello</a> and I'd like to <strong>change</strong> all <a href="link2">hello</a> with a custom text

Answer 3

<?php

$coded_string = "Hello, my name is <a href='link1'>Marco</a> and I'd like to <strong>change</strong> all <a href='link2'>links</a> with a custom text";

$dom_document = new DOMDocument();      
$dom_document->loadHTML($coded_string);
$dom_xpath = new DOMXpath($dom_document);

$links = $dom_xpath->query('//a');
foreach ($links as $link)
{
    $anchorText[] = $link->nodeValue;
}

$newCodedString = str_replace($anchorText, 'hello', $coded_string);

echo $newCodedString;