Search within XML with PHP code

Question

this is my code and i am trying to show the value of xml using Xpath but when i run this i am getting error in my code.

Here is the code

<?php
$load = new DOMDocument();
$load = simplexml_load_file("testing.xml");
var_dump($load);
$xpath = new DOMXpath($load);
var_dump($xpath);
$path1 = "/clip/metadata[name=keywords]/value";
$query = $xpath->query($path1);
var_dump("$query"); 
?>

this is the error, which i am getting

Catchable fatal error: Argument 1 passed to DOMXPath::__construct() must be an instance of DOMDocument, instance of SimpleXMLElement given in C:\xampp\htdocs\xml-text\index.php on line 5

No need to use simplexml_load_file, instead you can use load method of the DOMDocument object. — Alexander Guz
– Alexander Guz, Commented Jul 24, 2015 at 14:35

thatidiotguy · Accepted Answer · 2015-07-24 14:20:31Z

2

As the error states, you are not passing the constructor the appropriate arguments. simplexml_load_file returns a SimpleXmlElement object, NOT a DOMDocument object.

answered Jul 24, 2015 at 14:20

thatidiotguy

9,01114 gold badges66 silver badges109 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

kunal Over a year ago

thanks @thatidiotguy i am totally New with XML Programming through PHP and I am trying to load an xml file and then search within it. can you please give me a tip ,what can i used here. i also have used loadXML(); function but it still didnt work

honerlawd · Accepted Answer · 2015-07-24 16:03:01Z

1

As stated in the error, you are passing a SimpleXmlElement object instead of a DOMDocument object.

My previous answer was incorrect. It showed how to convert a SimpleXmlElement to a DOMElement not a DOMDocument.

http://php.net/manual/en/domdocument.load.php is how to properly load an xml file into a DOMDocument object.

$load = new DOMDocument();
$load->load("testing.xml");
$xpath = new DOMXpath($load);

Specifically to get the value of the node with the name Keywords you would do something like this

$load = new DOMDocument();
$load->preserveWhiteSpace = false;
$load->load(__DIR__ . "/testing.xml");
$xpath = new DOMXpath($load);
$path1 = '//clip/metadata/name[ . = "Keywords"]';
$query = $xpath->query($path1);
foreach($query as $entry) {
    $value = $entry->parentNode->childNodes->item(1)->nodeValue;
}

edited Jul 24, 2015 at 16:03

answered Jul 24, 2015 at 14:25

honerlawd

1,50911 silver badges10 bronze badges

11 Comments

kunal Over a year ago

Catchable fatal error: Argument 1 passed to DOMXPath::__construct() must be an instance of DOMDocument, null given in C:\xampp\htdocs\xml-text\index.php on line 6

kunal Over a year ago

thanks @ honerlawd now i am having this error to just to let you know, i am also trying to get it away and reading from the Link , what you have posted

honerlawd Over a year ago

@kunal I fixed my answer. I realized I was converting from SimpleXmlElement to DOMElement not DOMDocument.

kunal Over a year ago

thanks @honerlawd i seen your change and implementing it.

kunal Over a year ago

<?xml version="1.0" encoding="UTF-8"?> <clip> <supplier>people</supplier>   <metadata>     <name>Owner</name>     <value>Self-Company</value>   </metadata>   <metadata>     <name>Keywords</name>     <value>school: teacher, student classes</value>   </metadata>   </clip>

|

Collectives™ on Stack Overflow

Search within XML with PHP code

2 Answers 2

1 Comment

11 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

11 Comments

Your Answer

Sign up or log in

Post as a guest

Related