PHP Xpath 跟随兄弟姐妹

发布于 2024-08-18 13:01:59 字数 1292 浏览 2 评论 0原文

我正在尝试使用 xpath 来获取表的内容。

该表看起来像这样

<div>
<table>
<tr class="tableheader">
    <td> Stuff </td>
</tr>
<tr class="indent1">
     <td> Contents </td>
</tr>
<tr class="indent1">
     <td> Contents </td>
</tr>
<tr class="tableheader">
    <td> Stuff </td>
</tr>
<tr class="indent1">
     <td> Contents </td>
</tr>
<tr class="indent1">
     <td> Contents </td>
</tr>
</table>
</div>

我正在尝试提取表头之间所有 tr[@class='indent1'] 的值,

这就是我到目前为止所拥有的:

$elements = $xPath->query("div/table/tbody/tr[@class='tableheader']");

for ($i = 0; $i < $elements->length; $i++){
    print "Node: ".$elements->item($i)->nodeValue."\n";
    $siblings = $xPath->query("following-sibling::tr[@class='indent1']", $elements->item($i));
    foreach ($siblings as $sibling) {
        print "\tSibling: ".$sibling->nodeValue."\n";   
    }

} 

预期输出是

Node: Stuff
   Sibling:  Contents
   Sibling:  Contents
Node: Stuff
   Sibling:  Contents
   Sibling:  Content

s

而不是打印 ALL tr class="indent1s “对于每一个。

谢谢。

I'm trying to use xpath to get the contents of a table.

The table looks like this

<div>
<table>
<tr class="tableheader">
    <td> Stuff </td>
</tr>
<tr class="indent1">
     <td> Contents </td>
</tr>
<tr class="indent1">
     <td> Contents </td>
</tr>
<tr class="tableheader">
    <td> Stuff </td>
</tr>
<tr class="indent1">
     <td> Contents </td>
</tr>
<tr class="indent1">
     <td> Contents </td>
</tr>
</table>
</div>

I'm trying to pull the value of all tr[@class='indent1'] between table headers

this is what I have so far :

$elements = $xPath->query("div/table/tbody/tr[@class='tableheader']");

for ($i = 0; $i < $elements->length; $i++){
    print "Node: ".$elements->item($i)->nodeValue."\n";
    $siblings = $xPath->query("following-sibling::tr[@class='indent1']", $elements->item($i));
    foreach ($siblings as $sibling) {
        print "\tSibling: ".$sibling->nodeValue."\n";   
    }

} 

The expected output is

Node: Stuff
   Sibling:  Contents
   Sibling:  Contents
Node: Stuff
   Sibling:  Contents
   Sibling:  Content

s

Instead it is printing ALL tr class="indent1s" for each one.

Thanks.

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评论(1

自由范儿 2024-08-25 13:01:59

编辑:

好吧,也许这对您有帮助。只需获取每个兄弟并使用 PHP 检查属性:

foreach ($siblings as $sibling) {
    if (!is_null($sibling->attributes) 
        && $sibling->attributes->getNamedItem('class')->nodeValue == 'indent1') {
           break;
    }
    print "\tSibling: ".$sibling->nodeValue."\n";  
} 

您的总体目标是什么?如果您只想打印出节点,则使用 SAX 处理结构会更合适更容易(SAX 与 PHP)。

或者也许 XSLT 但我无法帮助你。

EDIT:

OK maybe this helps you. Just get every sibling and check the attributes with PHP:

foreach ($siblings as $sibling) {
    if (!is_null($sibling->attributes) 
        && $sibling->attributes->getNamedItem('class')->nodeValue == 'indent1') {
           break;
    }
    print "\tSibling: ".$sibling->nodeValue."\n";  
} 

What is your goal in general? If you just want to print out the nodes, processing the structure with SAX would be more appropriate and easier (SAX with PHP).

Or maybe XSLT but I cannot help you with that.

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