Crawl XML which has tag:tag Namespaces

Question

<url>
    <loc>http://example.com</loc>
    <news:news>
        <news:publication_date>2015-05-11</news:publication_date>
        <news:title>Some news content</news:title>
        <news:keywords/>
    </news:news>
</url>

<url>
    <loc>http://example2.com</loc>
    <news:news>
        <news:publication_date>2015-05-12</news:publication_date>
        <news:title>Some news content 2</news:title>
        <news:keywords/>
    </news:news>
</url>

How can get news:publication_date, news:title, news:keywords

I can get <loc>'s value but <news: tag getting null

$xml=simplexml_load_file("http://example.com") or die("Error!");

foreach($xml->url as $key){
    $URL = $key->loc;
    //What should I do here to get title, keywords, publication_date
}

for corrext xml file in first line a line must be such as which define namespace. — splash58, May 11 '15 at 14:00
Removing the xmlns attributes breaks and changes the document. Don't do that. Please post valid XML, so it is possible to reproduce your problem. — ThW, May 11 '15 at 18:19
It's important you post as well the xml namespace prefix declarations of that document otherwise this can't be answered. I suppose XML namespaces is a new concept to you and I close against a duplicate that shows how to read "element names with colons". — hakre, May 11 '15 at 21:20

score 0 · Answer 1 · answered May 11 '15 at 13:30

0

The simplest way is to suppressing error and ask without news:

$a = '<url>
    <loc>http://example.com</loc>
    <news:news>
        <news:publication_date>2015-05-11</news:publication_date>
        <news:title>Some news content</news:title>
        <news:keywords/>
    </news:news>
</url>';

$xml = @simplexml_load_string($a);

echo $xml->news->publication_date;

result:

2015-05-11

answered May 11 '15 at 13:30

splash58

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No, this won't work. – ihsan May 11 '15 at 13:37
https://eval.in/347471 – splash58 May 11 '15 at 13:39
When I use `$xml->news->publication_date;` in foreach it returns null. Also I tried `$key->news->publication_date;` – hakki May 11 '15 at 13:44
I don't know why eval.in can output that. Try it and output `null`. – ihsan May 11 '15 at 13:46
Yes! it don't see tag , i think, because it is not in name space – splash58 May 11 '15 at 13:46
This might be of your interest http://stackoverflow.com/q/595946/779320 – ihsan May 11 '15 at 13:46
anyway I solved problem. If XML has namespaces we need to use getNamespaces function. Then we can itarete. – hakki May 11 '15 at 14:03

hakki · Answer 2 · 2015-05-11T14:11:33.097

-1

I solved this problem. If xml has namespaces you should use getNamespaces(). Clear understanding compare my question and below answer.

$xml = simplexml_load_file("http://example.com") or die("Error!");

$ns = $xml->getNamespaces(true); // I ADDED THIS

foreach($xml->url as $key){

    $news  = $key->children($ns["news"]); //THIS

    $URL   = $key->loc;
    $PUBLISH_DATE = $news->news->publication_date; //THIS
    $TITLE = $news->news->title;  //AND THIS
}

If you want to read about getNamespaces(): http://www.nusphere.com/kb/phpmanual/function.simplexml-element-getnamespaces.htm

edited May 11 '15 at 14:11

answered May 11 '15 at 14:05

hakki

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It doesn't work with your example :( – splash58 May 11 '15 at 16:01
1

Do not read the namespaces from the document. Fetch the data using the namespaces. Do not depend on the prefixes. They are only aliases and can change and are optional (on elements). – ThW May 11 '15 at 18:13

Crawl XML which has tag:tag Namespaces

2 Answers2