[英]php DomXPath - how to strip html tags and its contents from nodeValue?
[英]PHP with DOMXPath - How to select and count from this html tree
我需要计算这些项目中有多少是未清的,它们有四种类型:容易,中等,困难和不想要。 所有这些类型都是div内的值。 我需要从计数中排除“不需要”类型。 请注意,“打开”和“关闭”值周围有不同数量的空格。 这是html结构:
<table>
<tbody>
<tr>
<td>
<div>Difficult</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Closed </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Medium</div>
</td>
<td>Name</td>
<td>Open </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Medium</div>
</td>
<td>Name</td>
<td> Closed</td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td>Closed </td>
</tr>
<tr>
<td>
<div>Not-wanted</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Difficult</div>
</td>
<td>Name</td>
<td>Open</td>
</tr>
............
这是我解决问题的尝试之一。 这显然是错误的,但我不知道如何正确解决。
$doc = new DOMDocument();
$doc->loadHtmlFile('http://www.nameofsite.com');
$doc->preserveWhiteSpace = false;
$xpath = new DOMXPath($doc);
$elements = $xpath->query("/html/body/div[1]/div/section/div/section/article/div/div[1]/div/div/div[2]/div[1]/div[2]/div/section/div/div/table/tbody/tr");
$count = 0;
foreach ($elements as $element) {
if ($element->childNodes->nodeValue != 'Not-wanted') {
if ($element->childNodes->nodeValue === 'open') {
$count++;
}
}
}
echo $count;
我对DOMXPath非常了解,因此对我来说太复杂了,因为我只能创建简单的查询。
有人可以帮忙吗?
提前致谢。
根据示例中的数据,我认为您可以将xpath表达式调整为此,以获得与您的条件匹配的所有<tr>
:
// table / tbody / tr [normalize-space(td [3] / text())='打开'和td [1] / div / text()!='不需要']
然后, $elements
的类型为DOMNodeList ,然后可以获取length
属性来获取列表中的节点数。
例如:
$source = <<<SOURCE
<table>
<tbody>
<tr>
<td>
<div>Difficult</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Closed </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Medium</div>
</td>
<td>Name</td>
<td>Open </td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Medium</div>
</td>
<td>Name</td>
<td> Closed</td>
</tr>
<tr>
<td>
<div>Easy</div>
</td>
<td>Name</td>
<td>Closed </td>
</tr>
<tr>
<td>
<div>Not-wanted</div>
</td>
<td>Name</td>
<td> Open </td>
</tr>
<tr>
<td>
<div>Difficult</div>
</td>
<td>Name</td>
<td>Open</td>
</tr>
</tbody>
</table>
SOURCE;
$doc = new DOMDocument();
$doc->loadHTML($source);
$doc->preserveWhiteSpace = false;
$xpath = new DOMXPath($doc);
$elements = $xpath->query("//table/tbody/tr[normalize-space(td[3]/text()) = 'Open' and td[1]/div/text() != 'Not-wanted']");
echo $elements->length;
这将导致:
5
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