PHP - XML: Filtering XML Nodes by Namespace

PHP XML Tips - Part 11: Do you want to find only those nodes belonging to a particular namespace? You can look solution like this:
01    <?php
02    $xmlString = <<< END
03    <?xml version="1.0"?>
04    <data xmlns:home="http://www.mysite.com/xmlns/home" xmlns:pdf="http://www.mysite.com/xmlns/work">
05      <home:file>content1.doc</home:file>
06      <pdf:file>content2.pdf</pdf:file>
07      <pdf:file>content3.pdf</pdf:file>
08      <home:file>content4.txt</home:file>
09      <home:file>content5.rtf</home:file>
10      <pdf:file>content6.pdf</pdf:file>      
11    </data>
12    END;
13   
14    $xml  = simplexml_load_string($xmlString);
15   
16    foreach($xml->children("http://www.mysite.com/xmlns/work") as $file){
17      echo $file ." <br />";
18    }
19    ?>

Result like this:
1    content2.pdf
2    content3.pdf
3    content6.pdf