剥离HTML标记及其内容

I'm using DOM to parse string. I need function that strips span tags and its contents. For example, if I have:

我正在使用DOM来解析字符串。我需要剥离span标签及其内容的功能。例如,如果我有:

This is some text that contains photo.
<span class='title'> photobyile</span>

I would like function to return

我想功能返回

This is some text that contains photo.

This is what I tried:

这是我试过的:

    $dom = new domDocument;
    $dom->loadHTML($string);
    $dom->preserveWhiteSpace = false;
    $spans = $dom->getElementsByTagName('span');

    foreach($spans as $span)
    {
        $naslov = $span->nodeValue; 
        echo $naslov;

        $string = preg_replace("/$naslov/", " ", $string);
    }

I'm aware that $span->nodeValue returns value of span tag and not whole tag, but I don't know how to get whole tag, together with class name.

我知道$ span-> nodeValue返回span标记的值而不是整个标记,但我不知道如何获得整个标记以及类名。

Thanks, Ile

2 个解决方案

#1

Try removing the spans directly from the DOM tree.

尝试直接从DOM树中删除跨度。

$dom = new DOMDocument();
$dom->loadHTML($string);
$dom->preserveWhiteSpace = false;

$elements = $dom->getElementsByTagName('span');
while($span = $elements->item(0)) {       
   $span->parentNode->removeChild($span);
}

echo $dom->saveHTML();

#2

@ile - I've had that problem - it's because the index of the foreach iterator happily keeps incrementing, while calling removeChild() on the DOM also seems to remove the nodes from the DomNodeList ($spans). So for every span you remove, the nodelist shrinks one element and then gets its foreach counter incremented by one. Net result: it skips one span.

@ile - 我遇到了这个问题 - 因为foreach迭代器的索引很快就会继续增加,而在DOM上调用removeChild()似乎也会从DomNodeList($ spans)中删除节点。因此,对于您删除的每个跨度,nodelist缩小一个元素,然后将其foreach计数器加1。最终结果:它跳过一个跨度。

I'm sure there is a more elegant way, but this is how I did it - I moved the references from the DomNodeList to a second array, where they would not be removed by the removeChild() operation.

我确信有一种更优雅的方式,但这就是我做的方式 - 我将引用从DomNodeList移动到第二个数组,在那里它们不会被removeChild()操作删除。

    foreach($spans as $span) {
        $nodes[] = $span;
    }
    foreach($nodes as $span) {
        $span->parentNode->removeChild($span);
    }

#1