display only nodes in XML with specific attributes in php [duplicate] - php

Question

This question already has answers here:
Using XPath, How do I select a node based on its text content and value of an attribute?
(2 answers)
Closed 9 years ago.
if i have:
<listing>
<name>Bob</name>
<age>20</age>
<hair>red</hair>
</listing>
<listing>
<name>John</name>
<age>24</age>
<hair>black</hair>
</listing>
how do i code my php page to only display listings if hair = black
so that it would only pull in
<listing>
<name>John</name>
<age>24</age>
<hair>black</hair>
</listing>
Thanks

Answer 1

Use XPath.
// First, your XML must be wraped with some root tag.
$data = <<<XML
<root>
<listing>
<name>Bob</name>
<age>20</age>
<hair>red</hair>
</listing>
<listing>
<name>John</name>
<age>24</age>
<hair>black</hair>
</listing>
</root>
XML;
// Instancing the SimpleXMLElement within the XML(obviously)
$xml = new SimpleXMLElement($data);
// XPath
$xpath = $xml->xpath("listing[contains(hair,'black')]");
/**
* eXplained XPath:
* <listing> that
* <hair>'s content is equal black
*/
foreach($xpath as $node){
// just for fun echoes the <results> node
echo $node->asXml();
}