DOMXPath
Just a quick "gotcha" that may sound stupid:
If you've registered your namespaces, loaded your XHTML, etc., into your XPath's DOMDocument object and <i>still</i> can't get it to work, check to make sure you haven't used the DOMDocument's loadHTML() or loadHTMLFile() function. For XHTML <i>always use the XML versions</i>, otherwise your XPath will never, ever work. Save yourself a couple hours of frustration...
DOMXPath::registerNamespace
(No version information available, might be only in CVS)
DOMXPath::registerNamespace — Registers the namespace with the DOMXPath object
Description
bool DOMXPath::registerNamespace
( string $prefix
, string $namespaceURI
)
Registers the namespaceURI and prefix with the DOMXPath object.
Parameters
- prefix
-
The prefix.
- namespaceURI
-
The URI of the namespace.
Return Values
Returns TRUE on success or FALSE on failure.
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User Contributed NotesDOMXPath::registerNamespace
adam dot prall at thinkingman dot com
09-Jun-2008 12:49
09-Jun-2008 12:49
cameron kellough
15-Apr-2007 08:33
15-Apr-2007 08:33
This is called prefix mapping and it is necessary to use xpath to handle documents which have default namespaces. //root/item will search for items with no namespace, not items with the namespace described as the default in the xmlns declaration. This problem is maddening as it just looks on the surface like xpath isn't working.
spam at spam dot spam
31-Mar-2005 11:46
31-Mar-2005 11:46
It is mentioned in a few places on the web, but it wasn't mentioned here. You need to use this function to set up a prefix for the default namespace of a document.
For instance, if you are trying to parse a Microsoft Spreadsheet XML file, which has the default namespace of "urn:schemas-microsoft-com:office:spreadsheet":
$doc = DOMDocument::load("my_spreadsheet.xml);
$xpath = new DOMXPath($doc);
$xpath->registerNamespace("m",
"urn:schemas-microsoft-com:office:spreadsheet");
$query = '/m:Workbook/m:Worksheet[1]/m:Table';
$result = $xpath->query($query, $doc);
You can use anything in place of the 'm', but you have to specify something! Just asking for "/Workbook/Worksheet/Table" doesn't work.