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remove comments from html source code

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深忆病人
深忆病人 2020-12-20 13:13

I know how to get the html source code via cUrl, but I want to remove the comments on the html document (I mean what is between ). In addition,

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  • 情书的邮戳
    2020-12-20 13:51

    Try PHP DOM*:

    $html = '<html><body><!--a comment--><div>some content</div></body></html>'; // put your cURL result here

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

$xpath = new DOMXPath($dom);
foreach ($xpath->query('//comment()') as $comment) {
    $comment->parentNode->removeChild($comment);
}

$body = $xpath->query('//body')->item(0);
$newHtml = $body instanceof DOMNode ? $dom->saveXml($body) : 'something failed';

var_dump($newHtml);

    Output:

    string(36) "<body><div>some content</div></body>"
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  • 小鲜肉
    2020-12-20 13:53

    I would pipe it to sed for a regex, something like 

    curl http://yoururl.com/test.html | sed -i "s/<!\-\-\s?\w+\s?\-\->//g" | sed "s/.?(<body>.?</body>).?/\1/"

    The regexes may not be exact, but you get the idea...

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  • 离开以前
    2020-12-20 13:58

    I've run in to issues modifying a DOMNodeList in a foreach loop which went away went I iterated backwards through the list. For that reason, I'd would not recommend a foreach loop as in the accepted answer. Instead use a for loop like this:

    $dom = new DOMDocument();
$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
for ($els = $xpath->query('//comment()'), $i = $els->length - 1; $i >= 0; $i--) {
    $els->item($i)->parentNode->removeChild($els->item($i));
}
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  • 孤独总比滥情好
    2020-12-20 14:00

    If there's no option for this in cUrl (and I suspect there isn't, but I've been wrong before) then you can at the very least parse the resulting HTML to your heart's content with a PHP DOM parser.

    This will likely be your best bet in the long run in terms of configurability and support.

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  • 醉酒成梦
    2020-12-20 14:04

    Regex solved this problem for me as follows:

    function remove_html_comments($html = '') {
    return preg_replace('/<!--(.|\s)*?-->/', '', $html);
}
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