"使用 SimpleXML 使用命名空间解析 XML [重复]"

Question

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Reference - How do I handle Namespaces (Tags and Attributes with a Colon in their Name) in SimpleXML?<\/a> (2 answers)<\/span>

Closed 2 months ago<\/span> .

<\/aside>

I have this as xml:

Answer 1

it does work without registerXPathNamespace and the full namespace prefix in the xpath queries:

$xml = new SimpleXMLElement($r);

foreach($xml->xpath('//event:event') as $event) {
 var_export($event->xpath('event:sessionKey'));
}

Answer 2

You have to register the namespace for each simpleXMLElement object you use.

$xml = new SimpleXMLElement($r);
$xml->registerXPathNamespace('e', 'http://www.webex.com/schemas/2002/06/service/event');

foreach($xml->xpath('//e:event') as $event) {
    $event->registerXPathNamespace('e', 'http://www.webex.com/schemas/2002/06/service/event');
    var_export($event->xpath('//e:sessionKey'));
}

The namespace should also be declared somewhere in the xml file.

<event:event xmlns:event="http://www.webex.com/schemas/2002/06/service/event">
...

The method ax described works too. You can skip the registerXPathNamespace if you know the xml file will always use the same prefix.

Answer 3

here alternative that worked for me.

$xml = simplexml_load_string($r);
$ns = $xml->getNamespaces(true);

foreach ($xml->children($ns['event'])->event as $skey) {
    $sessionKey = $skey->children($ns['event'])->sessionKey;
    echo $sessionKey;
}

Answer 4

Having worked a lot with simplexml, this is how I do it.

The magic trick if you already have an element and just want to get it's different namespaced children, say for a structure like this:

<entry>
<title type="text">My test entry</title>
<gd:when startTime="2017-02-26T02:00:00Z" endTime="2017-02-26T03:00:00Z"/>
<gc:notes type="string">A type</gc:notes>
</entry>

Is to send TRUE as the second parameter to the children function:

  $title = (string) $entry->title;
  $gd = $entry->children('gd', TRUE);
  $attrs = $gd->when->attributes();
  $startTime = (string) $attrs->startTime;
  $gc = $entry->children('gc', TRUE);
  $notes = (string) $gc->notes();

Answer 5

Another approach is to use SimpleXML<\/code> for parsing and DOMDocument<\/code> for manipulation\/access, which bypasses namespacing issues altogether:

$xml = new SimpleXMLElement($r);
$xml = dom_import_simplexml($xml);
$nodelist= $xml->getElementsByTagName('event');  
for($i = 0; $i < $nodelist->length; $i++) {
    $sessions = $nodelist->item($i)->getElementsByTagName('sessionKey');
    echo $sessions->item(0)->nodeValue;
}

Answer 6

Using registerXPathNamespace<\/code> and then calling xpath<\/code> didn't actually work for me. I had to go with the solution provided in this great post : http:\/\/blog.preinheimer.com\/index.php?\/archives\/172-SimpleXML,-Namespaces-Hair-loss.html<\/a>

echo $xml->children('http://www.webex.com/schemas/2002/06/service/event')->sessionName;

Answer 7

I could be wrong but I don't think XML with the colon symbol like SOAP can be parsed properly using SimpleXMLElement .

I'm sure there's a more elegant way of doing this but I usually read the file contents into a variable using file_get_contents() then replace/remove the colons then send it to SimpleXMLElement .