Need help getting values with simplexml

[duane.lortie]

I'm writing a routine that fetches XML and attempts to parse some
values from it.
A condensed entry node of the XML looks like this ..

<entry>
<title>Some title</title>
<author>
<name>Author</name>
</author>
<source:resource url="http://somesite.com?tid=123456"/>
</entry>

I am able to get the values for things like title and author->name
but I need to get the value of the attribute for source:resource,
namely 123456 in this case

What I have so far.. with the above assigned as $xmlstr ..

 
if ($xml = simplexml_load_string($xmlstr, NULL, LIBXML_NOEMPTYTAG))
{}else{
echo 'Something isn\'t right.'; exit();
}
 
foreach ($xml->entry as $entry) {
$title = $entry->title;
$name = $entry->author->name;
/*$tid =  presumably it is somehow accessable with SimpleXMLElement-
        
                >attributes
 
 
but the parser seems to dislike the colons in the tag*/
}
 
 

I was hopeing LIBXML_NOEMPTYTAG would help, but doesn't seem to.

Any hints ?

[=?ISO-8859-1?Q?=22=C1lvaro_G=2E_Vicario=22?=]

du**********@gmail.com escribió:

I'm writing a routine that fetches XML and attempts to parse some
values from it.
A condensed entry node of the XML looks like this ..

<entry>
<title>Some title</title>
<author>
<name>Author</name>
</author>
<source:resource url="http://somesite.com?tid=123456"/>
</entry>

I am able to get the values for things like title and author->name
but I need to get the value of the attribute for source:resource,
namely 123456 in this case

Tags with colons, like <source:resource>, use namespaces. Many XML
parsers have poor support for namespaces, or none at all. As far as I
know SimpleXML can handle namespaces but the documentation is not very
clear. I had to parse such XML not long ago and I couldn't manage to do
it with SimpleXML so I can't provide you with working code but I'll tell
you what I learnt in case it helps.

1) You need to have somewhere in your XML an attribute like this:

xmlns:source="some-unique-id"

I guess your full XML file has it. This prevents the "namespace error"
warning in simplexml_load_string().

2) Supposedly, you need to use the children() method to get elements
that belong to a namespace:

$children = $entry->children('source', TRUE);

3) Once you have the element, you need to fetch the URL as *attribute*.
This works for me when there aren't namespaces:

<foo bar="blah"---$xml->foo['bar']

See also the attributes() method.

I was hopeing LIBXML_NOEMPTYTAG would help, but doesn't seem to.

According to docs this option *removes* blank nodes:

http://es.php.net/manual/en/libxml.constants.php

As I said, these are only general ideas. I've never made it work myself.
If it's an option, you might consider other tools like XMLReader or a
PHP port of JavaScript's jQuery library called phpQuery:
http://code.google.com/p/phpquery/

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