RSS XML Parsing issue (How to get media content value from the RSS feed?) [duplicate]

I have a rss feed url which generates an xml as follows:

 <?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/" 
 xmlns:flow="http://www.flownetworks.com/schemas/media/0.1.0"><channel>
 <title>flow-Media Catalog</title>
 <link>http://catalog.flownetworks.com/catalogs/1/videos.mrss</link>
 <description>Video Catalog</description>
 <image>
    <url>http://images.flow-media.com/flow_media_current.png</url>
    <title>Get to know flow-Media</title>
    <link>http://www.flow-media.com</link>
 </image>
 <generator>flow-Media</generator>
 <item>
   <title>..</title>
   <link>..</link>
   <description>..</description>
   <pubDate>Wed, 01 May 2013 07:01:08 GMT</pubDate>
   <guid isPermaLink="false">9809880</guid>
   <flow:short_description/>
   <flow:video_product_id>52985890</flow:video_product_id>
   <flow:availability end="" start="2013-05-01T06:44:41Z"/>
   <flow:show/>
   <media:group>
   <media:category>US</media:category>
   <media:thumbnail url="http://images.flow-media.com/ap/2013/05/01/09d462107646ab09def454a1a923a423edd6d2d9_preview.jpg" height="360" width="640"/>
   <media:thumbnail url="http://images.flow-media.com/ap/2013/05/01/09d462107646ab09def454a1a923a423edd6d2d9_thumbnail.jpg" height="90" width="160"/>
   <media:content duration="101" medium="video" isDefault="true" url="http://player.flownetworks.com/swf/cube.swf?a=V5299690&amp;m=9&amp;w=420&amp;h=375" type="application/x-shockwave-flash" expression="full" height="375" lang="en-us" width="420">
    </media:content>
    </media:group>
   </item>
   </channel>

I want to save image and category value in database.Here is my php code:

$apiURL="http://catalog.flownetworks.com/catalogs/01/videos/search.mrss?api_key=%206784cb3bed8f80c55054ac0de996f8e9f0bf8763";
$videoId="&video_product_id=".$videoID."";
$combinevURL=$apiURL.$videoId;
$mediafile = simplexml_load_file($combinevURL);

Problem: the problem is "simplexml_load_file" do not generate category name and media thumbnail image value of the xml.I want to get value from this xml.Please help.

hakre

To successfully obtain these media elements you first of all need to find the parent element. How to access those non-namespaced elements is outlined in depth in the basic Simplexml usage examples, I spare you this highly redundant code here.

So after obtaining the parent into a variable - let's call it $item this time - it works as outlined in the already hinted duplicated Q&A material, just here specific to your example XML:

$media = $item->children('media', true);
                            |
                          __|__
 <rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/" 
                    xmlns:flow="http://www.flownetworks.com/schemas/media/0.1.0">

By using the namespace-prefix, it corresponds to the highlighted prefix part. This requires to use true as second parameter.

You can also use the alternative, the namespace-URI, so you can spare the second parameter (defaults to FALSE):

$media = $item->children('http://search.yahoo.com/mrss/');
                                        |
                                 _______|_____________________
 <rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/" 
                    xmlns:flow="http://www.flownetworks.com/schemas/media/0.1.0">

Regardless which variant you prefer, telling simplexml exactly that you are concerned about children in the media XML-namespace enables you to access the various parts from within that media group as you know it:

$group = $media->group;
echo $group->category, "\n"; # US

I hope this is helpful and explicitly shows you how it works for the namespaced elements. You need to use the SimpleXMLElement::children() method and specify which namespace you mean of getting the children elements from.

来源：https://stackoverflow.com/questions/16318059/rss-xml-parsing-issue-how-to-get-media-content-value-from-the-rss-feed