how to get the values from this xml using dom in php?

Question

how can i get the values of a,b and c from the following xml code?

<result name="response" f="139" c="0">
−
<doc score="5.06756" pos="0">
<snippet name="a" highlighted="yes">example</snippet>
<snippet name="b" highlighted="yes">bexample</snippet>
<snippet name="c">cexample</snippet>


</doc>
</result>

I tried to print the nodes, but It failed:

$xmlDoc = new DOMDocument();
$xmlDoc->load($content);

$x = $xmlDoc->documentElement;
foreach ($x->childNodes AS $item)
  {
  print $item->nodeName . " = " . $item->nodeValue . "<br />";
  }

Can anyone tell me how I can parse it? I cannot use simple xml, so I am moving to Dom.

possible duplicate of Regular expression for grabbing the href attribute of an A element — Gordon
– Gordon, Commented Mar 2, 2011 at 12:12
possible duplicate of How to extract a node attribute from XML using PHP's DOM Parser — Gordon
– Gordon, Commented Mar 2, 2011 at 12:17
possible duplicate of DOMDocument::load Getting attribute value — Gordon
– Gordon, Commented Mar 2, 2011 at 12:18

Community · Accepted Answer · 2023-11-17 19:42:58Z

Using DOM allows you to use several distinct ways of extracting informations.
For example, you could work with :

DOMDocument::getElementsByTagName, to extract all tags having a specific name.
Or DOMXPath, for more complex queries.

As an example, here's a portion of code that demonstrates how to use the first solution to extract all `` tags :

$snippets = $xmlDoc->getElementsByTagName('snippet');
foreach ($snippets as $tag) {
  echo $tag->getAttribute('name') . ' = ' . $tag->nodeValue . '<br />';
}

And you'd get this output :

a = example
b = bexample
c = cexample

And, as another example, here's a solution that demonstrates how to use the second solution, to do a more complex query on the XML data -- here, extracting the `` tag that as it's `name` attribute with a value of `a` :

$xpath = new DOMXPath($xmlDoc);
$snippetsA = $xpath->query('//snippet[@name="a"]');
if ($snippetsA->length > 0) {
  foreach ($snippetsA as $tag) {
    echo $tag->getAttribute('name') . ' = ' . $tag->nodeValue . '<br />';
  }
}

Which only gets you one result -- the corresponding tag :

a = example

Starting from here, the possibilities are almost limitless ;-)

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