假设我们有此输入:
<div wrap>1</div>
<div>2</div>
<div wrap>3</div>
<div wrap>4</div>
<div wrap>5</div>
所需的输出应为:
<div class="wrapper">
<div wrap>1</div>
</div>
<div>2</div>
<div class="wrapper">
<div wrap>3</div>
<div wrap>4</div>
<div wrap>5</div>
</div>
另外,假设这些元素是身体元素的直接子女,并且可以在它们之前或之后有其他无关元素或文本节点。
注意如何将连续元素分组在单个包装器中而不是单独包装中。
您将如何处理身体的domnodelist并将包装器插入正确的位置?
在对话之后(评论)仅包装身体元素的孩子,
对于此输入:
<body>
<div wrap>1
<div wrap>1.1</div>
</div>
<div>2</div>
<div wrap>3</div>
<div wrap>4</div>
<div wrap>5</div>
</body>
所需的输出应为:
<body>
<div class="wrapper">
<div wrap>1
<div wrap>1.1</div>
<!–– ignored ––>.
</div>
</div>
<div>2</div>
<div class="wrapper">
<div wrap>3</div>
<div wrap>4</div>
<div wrap>5</div>
</div>
</body>
注意不是的元素如何完全忽略了身体元素的直接后代。
写作很有趣,很高兴看到其他解决方案,但无论如何都是我的尝试。
我在代码中添加了评论,而不是在这里描述该方法,因为我认为这些评论使理解更容易...
// Test HTML
$startHTML = '<div wrap>1</div>
<div>2</div>
<div wrap>3</div>
<div wrap>4</div>
<div wrap>5</div>';
$doc = new DOMDocument();
$doc->loadHTML($startHTML);
$xp = new DOMXPath($doc);
// Find any div tag with a wrap attribute which doesn't have an immediately preceeding
// tag with a wrap attribute, (or the first node which means it won't have a preceeding
// element anyway)
$wrapList = $xp->query("//div[@wrap='' and preceding-sibling::*[1][not(@wrap)]
or position() = 1]");
// Iterate over each of the first in the list of wrapped nodes
foreach ( $wrapList as $wrap ) {
// Create new wrapper
$wrapper = $doc->createElement("div");
$class = $doc->createAttribute("class");
$class->value = "wrapper";
$wrapper->appendChild($class);
// Copy subsequent wrap nodes (if any)
$nextNode = $wrap->nextSibling;
while ( $nextNode ) {
$next = $nextNode;
$nextNode = $nextNode->nextSibling;
// If it's an element (and not a text node etc)
if ( $next->nodeType == XML_ELEMENT_NODE ) {
// If it also has a wrap attribute - copy it
if ($next->hasAttribute("wrap") ) {
$wrapper->appendChild($next);
}
// If no attribute, then finished copying
else {
break;
}
}
}
// Replace first wrap node with new wrapper
$wrap->parentNode->replaceChild($wrapper, $wrap);
// Move the wrap node into the wrapper
$wrapper->insertBefore($wrap, $wrapper->firstChild);
}
echo $doc->saveHTML();
当使用HTML时,最终结果也包裹在标准标签中,但是输出(格式)为...
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html>
<body>
<div class="wrapper">
<div wrap>1</div>
</div>
<div>2</div>
<div class="wrapper">
<div wrap>3</div>
<div wrap>4</div>
<div wrap>5</div>
</div>
</body>
</html>
编辑:
如果您只想将其应用于<body>
标签的直接后代,请更新XPath表达式以将其包含在标准的一部分...
$wrapList = $xp->query("//body/div[@wrap='' and preceding-sibling::*[1][not(@wrap)]
or position() = 1]");