dourui7186 2017-05-14 12:48
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在P标签内preg_replace目标图像

I am using preg_replace to change some content, I have 2 different types of images...

<p>
    <img class="responsive" src="image.jpg">
</p>

<div class="caption">
    <img class="responsive" src="image2.jpg">
</div>

I am using preg_replace like this to add a container div around images...

function filter_content($content)
    {
        $pattern = '/(<img[^>]*class=\"([^>]*?)\"[^>]*>)/i';
        $replacement = '<div class="inner $2">$1</div>';
        $content = preg_replace($pattern, $replacement, $content);
        return $content;
    }

Is there a way to modify this so that it only affect images in P tags? And also vice versa so I can also target images within a caption div?

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  • dongyan3853 2017-05-14 13:02
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    Absolutely.

    $dom = new DOMDocument();
$dom->loadHTML("<body><!-- DOMSTART -->".$content."<!-- DOMEND --></body>");
$xpath = new DOMXPath($dom);
$images = $xpath->query("//p/img");
foreach($images as $img) {
    $wrap = $dom->createElement("div");
    $wrap->setAttribute("class","inner ".$img->getAttribute("class"));
    $img->parentNode->replaceChild($wrap,$img);
    $wrap->appendChild($img);
}
$out = $dom->saveHTML();
preg_match("/<!-- DOMSTART -->(.*)<!-- DOMEND -->/s",$out,$match);
return $match[1];

    It's worth noting that while parsing arbitrary HTML with regex is a disaster waiting to happen, using a parser with markers and then matching based on those markers is perfectly safe.

    Adjust the XPath query and/or inner manipulation as needed.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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