在< p>内保留换行符使用DOMXPath的标签？ [英] Preserve line breaks inside <p> tags using DOMXPath?

问题描述

我正在使用PHP和 DOMXPath 来获取所有< p> 元素的内容的网页：

I'm currently using PHP and DOMXPath to get the contents of all of the <p> elements of a web page:

<?php
...    
$doc = new DOMDocument();
$doc->loadHTML($html);

$xpath = new DOMXPath($doc);
$paragraphs = $xpath->evaluate("/html/body//p");

foreach ($paragraphs as $paragraph){
echo $paragraph->textContent . "<br />";
}

我的问题是，从 textContent 不尊重< p> 中存在的 元素。相反，它会删除换行符，并将通常在单独行上的单词相加。例如：

My problem is that the string resulting from textContent does not respect <br /> tags that exist within those <p> elements. Instead it removes the line break and pushes words together that would normally be on separate lines. For example:

示例HTML：

<p>
Some happy talk goes here talking about our great product.<br />
We would love for you to buy it!
</p>

<p>
Random information and what not<br />
Isn't that cool?
</p>

目前来自PHP的输出：

Current Output from PHP above:

Some happy talk about our great product.We would love for you to buy it!

Random information and what notIsn't that cool?

我尝试过 $ paragraph = $ doc-> getElementsByTagName（p ）; 以及它给我一样的东西。

I have tried $paragraphs = $doc->getElementsByTagName("p"); as well and it gives me the same thing.

有没有办法使DOMXPath / DOMDocument保留换行符？我需要能够分隔一个段落中的每个单词，而当前的输出不允许。

Is there a way to make DOMXPath/DOMDocument preserve the line breaks? I need to be able to separate each of the words within a paragraph, and the current output disallows that.

如果有一个替代方法来检索< p> 元素，同时保留< br /> 或'\\\
' / code>这也是很棒的。

If there is an alternative method for retrieving the string within <p> elements while preserving <br /> or '\n' that would also be great.

编辑

进一步调查后，相关HTML实际上是由< br> 标签分隔的锚点列表，但没有实际的换行符：

Upon further investigation the HTML in question is actually a list of anchors separated by <br> tags but with no actual line breaks:

<p class="home_page_list"><a href="/home/personal-banking/checking/Category-Page-Classic-Checking/classic-checking.html">Classic Checking</a><br> <a href="/home/personal-banking/checking/Category-Page-Interest-Checking/interest-checking.html">Interest Checking</a><br> <a href="/home/personal-banking/checking/Category-Page-Interest-Checking/interest-premium-checking.html">Premium Checking</a><br> <a href="/home/personal-banking/Savings-Category-Page/Basic-Savings-Category-Page/basic-savings.html">Savings Plans</a><br> <a href="/home/personal-banking/Savings-Category-Page/Money-Market-Accounts-Category-Page/money-market-accounts.html">Money Market Accounts</a><br> <a href="/home/personal-banking/Savings-Category-Page/Certificates-of-Deposit-Category-Page/fixed-rate-CD.html">CDs</a><br> <a href="/home/personal-banking/Savings-Category-Page/Individual-Retirement-Account-Category-Page/individual-retirement-account.html">IRAs</a></p>

证明这可以与给定的原始HTML正常工作。

Turns out that this works properly with the original HTML given.

更新：解决

在@ ircmaxell的帮助下，并且@netcoder和@Gordon留下的评论已经解决了，它不是非常优雅，但现在将会做。

With the help of @ircmaxell's answer, and the comments left by @netcoder and @Gordon this has been solved, it's not very elegant but it will do for now.

示例：

foreach ($paragraphs as $paragraph){
    $p_text = new DOMDocument();
    $p_text->loadHTML(str_ireplace(array("<br>", "<br />"), "\r\n", DOMinnerHTML($paragraph)));
    //Do whatever, in this case get all of the words in an array.
    $words = explode(" ", str_ireplace(array(",", ".", "&", ":", "-", "\r\n"), " ", $p_text->textContent));
print_r($words);
}

这使用 DOMinnerHTML （由@netcoder建议）将< br> 的实例替换为 \\\\
（由@ircmaxell建议），然后可以在 textContent之后评估。

This makes use of DOMinnerHTML (as suggested by @netcoder) to replace the instances of <br> with "\r\n" (as suggested by @ircmaxell), which can then be evaluated post textContent.

显然有一些改进的空间，但它解决了我目前的问题。

Obviously there's some room for improvement, but it has solved my current issue.

感谢大家帮助，

Ben

推荐答案

嗯，我会做的是用文字换行替换换行符：

Well, what I would do is replace the line-breaks with literal linebreaks:

$doc = new DOMDocument();
$doc->loadHTML($html);

$brs = $doc->getElementsByTagName('br');
foreach ($brs as $node) {
    $node->parentNode->replaceChild($doc->createTextNode("\r\n"), $node);
}


$xpath = new DOMXPath($doc);
$paragraphs = $xpath->evaluate("/html/body//p");

foreach ($paragraphs as $paragraph){
    echo $paragraph->textContent . "<br />";
}

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