Export particular element in DOMDocument to string

2019-02-21 19:33发布

站内问答 / PHP
1412 3 5

I'm importing some arbitrary HTML into a DOMDocument using the loadHTML() function, eg.:

$html = '<p><a href="test.php">Test</a></p>';
$doc = new DOMDocument;
$doc->loadHTML($html);

I then want to change a few attributes/node values using DOMDocument methods which I can do no problem.

Once I've made these changes I'd like to export the HTML string (using ->saveHTML()), without the <html><body>... tags that the DOMDocument automatically adds to the HTML.

I understand why these are added (to ensure a valid document), but how would I go about just getting my edited HTML back (essentially everything between the <body> tags)?

I have read this post and while it offers some solutions I would rather do this 'properly', i.e. without using a string replace on the <body> tags. Validity of the HTML is not an issue as it's run through an HTML purifier before hand.

Any ideas? Thanks.

EDIT

I'm aware of the $node parameter added to saveHTML() in PHP 5.3.6, unfortunately I'm stuck with 5.2.

3条回答
狗以群分
2楼-- · 2019-02-21 20:07

Thanks but I won't necessarily know the type of the first tag in the body, it needs to be generic

$domnodelist = $doc->getElementsByTagName('*');
$domnode = $domnodelist->item(0);
echo $doc->saveXML($domnode);
查看更多
0人赞 添加讨论(0) 举报
太酷不给撩
3楼-- · 2019-02-21 20:15

Perhaps the source code of this will help - They're using a regex to strip out the unnecessary strings:

http://beerpla.net/projects/smartdomdocument-a-smarter-php-domdocument-class/

$content = preg_replace(array("/^\<\!DOCTYPE.*?<html><body>/si",
                                  "!</body></html>$!si"),
                            "",
                            $this->saveHTML());

return $content;

saveHTMLExact() - DOMDocument has an extremely badly designed "feature" where if the HTML code you are loading does not contain <html> and <body> tags, it adds them automatically (yup, there are no flags to turn this behavior off).

Thus, when you call $doc->saveHTML(), your newly saved content now has <html><body> and DOCTYPE in it. Not very handy when trying to work with code fragments (XML has a similar problem).

SmartDOMDocument contains a new function called saveHTMLExact() which does exactly what you would want – it saves HTML without adding that extra garbage that DOMDocument does.

Also, other questions have asked similar things:

How to saveHTML of DOMDocument without HTML wrapper?

查看更多
0人赞 添加讨论(0) 举报
可以哭但决不认输i
4楼-- · 2019-02-21 20:20

Try using DOMDocument->saveXML()?

<?php
$html = '<p><a href="test.php">Test</a></p>';
$doc = new DOMDocument();
$doc->loadHTML($html);
$domnodelist = $doc->getElementsByTagName('p');
$domnode = $domnodelist->item(0);
echo $doc->saveXML($domnode);
?>

It outputs <p><a href="test.php">Test</a></p>

查看更多
0人赞 添加讨论(0) 举报
登录 后发表回答
相关问题
查看全部
相关文章
查看全部
收藏的人(5)