使用正则表达式将图像包装在标签中 [英] Using regex to wrap images in tags

问题描述

我一直在使用正则表达式将我的图像包装在 <a > 标签并改变它们的路径等.我知道为此使用 dom 更好，已经阅读了很多关于包装的主题，但我无法理解如何使用.

I've been using regex to wrap my images in < a > tags and altering their paths etc. I know using dom for this is better, having read a lot of threads about wrapping, but I'm unable to understand how to.

这是我正在使用的:

$comments = (preg_replace('@(<img.+src=[\'"]/uploads/userdirs/admin)(?:.*?/)(.+?)\.(.+?)([\'"].*?>)@i', '<a class="gallery" rel="'.$pagelink.'" href=/uploads/userdirs/'.$who.'/$2.$3>$1/mcith/mcith_$2.$3$4</a>', $comments));

它成功地将每个图像包装在我想要的标签中.但前提是提供的字符串 ($comments) 具有正确的标记.

It successfully wraps each image in the tags I want. But only if the string provided ($comments) has the right markup.

<p><img src="/uploads/userdirs/admin/1160501362291.png" alt="" width="1280" height="960" /></p>
<p><img src="/uploads/userdirs/admin/100_Bullets_68_1280x1024.jpg" alt="" width="1280" height="1024" /></p>

当这样呈现时，它起作用了.我正在使用 tinymce 所以它包裹在 <p > 当我用回车换行时.但是当我不这样做时，当我只是一个接一个地插入图像使 HTML 看起来像这样时，它不会:

When presented like this, it works. I'm using tinymce so it wraps in < p > when I do a linebreak with enter. But when I don't do that, when I just insert images one after another so the HTML looks like this, it won't:

<p><img src="/uploads/userdirs/admin/1160501362291.png" alt="" width="1280" height="960" /><img src="/uploads/userdirs/admin/100_Bullets_68_1280x1024.jpg" alt="" width="1280" height="1024" /></p>

它会将这 2 个图像包装在相同的 <> 标签.使输出看起来像这样:

It will instead wrap those 2 images in the same < a > tag. Making the output look like this:

<p><a class="gallery" rel="test" href="/uploads/userdirs/admin/100_Bullets_68_1280x1024.jpg">
<img src="/uploads/userdirs/admin/1160501362291.png" alt="" width="1280" height="960">
<img src="/uploads/userdirs/admin/mcith/mcith_100_Bullets_68_1280x1024.jpg" alt="" width="1280" height="1024">
</a></p>

这是错误的.我想要的输出是这样的:

Which is wrong. The output I want is this:

<p><a class="gallery" rel="test2" href="/uploads/userdirs/admin/100_Bullets_68_1280x1024.jpg"><img src="/uploads/userdirs/admin/mcith/mcith_100_Bullets_68_1280x1024.jpg" alt="" width="1280" height="1024"></a></p>
<p><a class="gallery" rel="test2" href="/uploads/userdirs/admin/1154686260226.jpg"><img src="/uploads/userdirs/admin/mcith/mcith_1154686260226.jpg" alt="" width="1280" height="800"></a></p>

推荐答案

我遗漏了一些细节，但是我将如何使用 DOMDocument 做到这一点:

I've left out a few details, but here's how I would do it using DOMDocument:

$s = <<<EOM
<p><img src="/uploads/userdirs/admin/1160501362291.png" alt="" width="1280" height="960" /></p>
<p><img src="/uploads/userdirs/admin/100_Bullets_68_1280x1024.jpg" alt="" width="1280" height="1024" /></p>
EOM;

$d = new DOMDocument;
$d->loadHTML($s);

foreach ($d->getElementsByTagName('img') as $img) {
    $img_src = $img->attributes->getNamedItem('src')->nodeValue;
    if (0 === strncasecmp($img_src, '/uploads/userdirs/admin', 23)) {
        $a = $d->createElement('a');

        $a->setAttribute('class', 'gallery');
        $a->setAttribute('rel', 'whatever');
        $a->setAttribute('href', '/uploads/userdirs/username/' . $img_src);

        // disconnect image tag from parent
        $img->parentNode->replaceChild($a, $img);

        // and move to anchor
        $a->appendChild($img);
    }
}

echo $d->saveHTML();

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