Retrieving Specific Element Value XML - PHP [duplicate] - php

Question

This question already has answers here:
How do you parse and process HTML/XML in PHP?
(31 answers)
Closed 8 years ago.
I have the following xml file:
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<ns2:doTransactionResponse xmlns:ns2="http://soap.api.controller.web.payjar.com/">
<return>
<displayMessage>An error occurred with this payment, please contact your merchant (ref: P022)</displayMessage>
<merchantReference>mercRef_1350047403</merchantReference>
<payUReference>11999149347</payUReference>
<pointOfFailure>PAYU</pointOfFailure>
<resultCode>P022</resultCode>
<resultMessage>Transaction is not in the correct state - last transaction: FINALIZE state: SUCCESSFUL</resultMessage>
<successful>false</successful>
</return>
</ns2:doTransactionResponse>
</soap:Body>
</soap:Envelope>
I need to test the result code in the xml file against a series of codes. How would I get the specific element value of <resultCode> using PHP?

Answer 1

DOMDocument in combination with getElementsByTagName would be a quick solution.
DOMDocument::getElementsByTagName
$xml_string = '<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<ns2:doTransactionResponse xmlns:ns2="http://soap.api.controller.web.payjar.com/">
<return>
<displayMessage>An error occurred with this payment, please contact your merchant (ref: P022)</displayMessage>
<merchantReference>mercRef_1350047403</merchantReference>
<payUReference>11999149347</payUReference>
<pointOfFailure>PAYU</pointOfFailure>
<resultCode>P022</resultCode>
<resultMessage>Transaction is not in the correct state - last transaction: FINALIZE state: SUCCESSFUL</resultMessage>
<successful>false</successful>
</return>
</ns2:doTransactionResponse>
</soap:Body>
</soap:Envelope>';
$dom = new DOMDocument;
$dom->loadXML($xml_string);
$nodes = $dom->getElementsByTagName('resultCode');
foreach ($nodes as $node) {
echo $node->nodeValue;
}
Result: P022
Of course there are several other ways to work with XMLs in PHP (xpath etc.)

Answer 2

Using xpath. Here's the code as mentioned by KURN,
<?php
$xml = '<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<ns2:doTransactionResponse
xmlns:ns2="http://soap.api.controller.web.payjar.com/">
<return>
<displayMessage>An error occurred with this payment, please contact
your merchant (ref: P022)</displayMessage>
<merchantReference>mercRef_1350047403</merchantReference>
<payUReference>11999149347</payUReference>
<pointOfFailure>PAYU</pointOfFailure>
<resultCode>P022</resultCode>
<resultMessage>Transaction is not in the correct state - last
transaction: FINALIZE state: SUCCESSFUL</resultMessage>
<successful>false</successful>
</return>
</ns2:doTransactionResponse>
</soap:Body>
</soap:Envelope>
';
$xml = simplexml_load_string($xml, NULL, NULL, "http://schemas.xmlsoap.org/soap/envelope/");
$xml->registerXPathNamespace('soapenv', 'http://schemas.xmlsoap.org/soap/envelope/');
foreach($xml->xpath('//soapenv:Body') as $header)
{
$arr = $header->xpath('//resultCode'); // Should output 'something'.
$resultCode = $arr[0];
echo $resultCode;// outputs P022
}
?>

Answer 3

Actually this is quite easy with PHP:
$resultCode = simplexml_load_string($xml_string)->xpath('//resultCode')[0];
var_dump((string) $resultCode); // string(4) "P022"
Note that this code has no error checking, it might fatal-error in case the XML can not be loaded and warnings/notices if the element you're looking for does not exist at least once.