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Asked: 2026-05-28T17:32:21+00:00

I want to get values and attributes from a selector and then get attributes

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I want to get values and attributes from a selector
and then get attributes and values of its children based on a query.

allow me to give an example.

this is the structure

<div class='message'>
   <div>
   <a href='http://www.whatever.com'>Text</a>
   </div>

   <div>
    <img src='image_link.jpg' />
   </div>

</div>

<div class='message'>
   <div>
   <a href='http://www.whatever2.com'>Text2</a>
   </div>

   <div>
    <img src='image_link2.jpg' />
   </div>

</div>

So I would like to make a query to match all of those once.

Something like this: 

 //$dom is the DomDocument() set up after loaded HTML with $dom->loadHTML($html);
$dom_xpath = new DOMXpath($dom);
$elements = $dom_xpath->query('//div[@class="message"], //div[@class="message"] //a, //div[@class="message"] //img');

foreach($elements as $ele){
   echo $ele[0]->getAttribute('class'); //it should return 'message'
   echo $ele[1]->getAttribute('href'); //it should return 'http://www.whatever.com' in the 1st loop, and 'http://www.whatever2.com' in the second loop
   echo $ele[2]->getAttribute('src'); //it should return image_link.jpg in the 1st loop and 'image_link2.jpg' in the second loop
}

Is there some way of doing that using multiple xpath selectors like I did in the example? to avoid making queries all the time and save some CPU.

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1 Answer

  1. Editorial Team

    Use:

    (//div[@class='message'])[$k]//@*

    This selects all three attributes that belong to the $k-th div (and any of its descendants) in the document whose class attribute has string value "message"

    You can evaluate N such XPath expressions — for $k from 1 to N, where N is the total count of //div[@class='message']

    XSLT – based verification:

    <xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output omit-xml-declaration="yes" indent="yes"/>

 <xsl:template match="/">
  <xsl:for-each select="//div[@class='message']">
    <xsl:variable name="vPos" select="position()"/>

    <xsl:apply-templates select=
    "(//div[@class='message'])[0+$vPos]//@*"/>
 ================
  </xsl:for-each>
 </xsl:template>

 <xsl:template match="@*">
  <xsl:value-of select=
  "concat('name = ', name(), ' value = ', ., '&#xA;')"/>
 </xsl:template>
</xsl:stylesheet>

    when this transformation is applied on the provided XML document (wrapped in a single top element to become well-formed):

    <html>
    <div class='message'>
        <div>
            <a href='http://www.whatever.com'>Text</a>
        </div>
        <div>
            <img src='image_link.jpg' />
        </div>
    </div>
    <div class='message'>
        <div>
            <a href='http://www.whatever2.com'>Text2</a>
        </div>
        <div>
            <img src='image_link2.jpg' />
        </div>
    </div>
</html>

    The XPath expression is evaluated twice and the selected attributes are formatted and output:

    name = class value = message
name = href value = http://www.whatever.com
name = src value = image_link.jpg

 ================
name = class value = message
name = href value = http://www.whatever2.com
name = src value = image_link2.jpg

 ================
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