Parse SOAP XML

Demonstrates how to parse SOAP XML.

Download Chilkat XML ActiveX

<?php


$xml = new COM("Chilkat.Xml");

//  The Chilkat XML component is freeware.

//  Load an XML document.
//  This document may be downloaded at:
//  http://www.chilkatsoft.com/testData/soap1.xml
$success = $xml->LoadXmlFile('soap1.xml');
if ($success == false) {
    print $xml->lastErrorText() . "\n";
    exit;
}

//  The sample XML document parsed here is a prime example
//  of how NOT to design your XML schema.  When designing
//  XML, always keep in mind how a program might parse it.
//  Poorly designed XML is a big pain-in-the-ass to parse.
//  We'll show you a much better schema at the end of this
//  example.

//  Here's the XML we'll want to parse:

//  <?xml version="1.0" encoding="utf-8"?><soap:Envelope
//  xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
//  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
//  xmlns:xsd="http://www.w3.org/2001/XMLSchema">
//  <soap:Body>
//  <SendRequestResponse
//  xmlns="http://merchantwarehouse.com/webservices/public/MerchantWareService1">
//  <SendRequestResult>
//  <Code>Approved</Code>
//  <ProcessorData>[Response_Code][00][Response_Text][106857][Auth_Reference
//  ][0016][Amount_Balance][205.78][Expiration_Date][012014][Trans_Date_Time
//  ][012209000734][Card_Number][710001900593731][Transaction_ID][1]</ProcessorData>
//  <Fields><Field>
//  <Code>Unknown</Code><Value>1</Value>
//  </Field>
//  <Field>
//  <Code>Message</Code><Value>106857</Value>
//  </Field>
//  <Field>
//  <Code>AuthCodeResp</Code><Value>0016</Value>
//  </Field>
//  <Field>
//  <Code>Balance</Code><Value>205.78</Value>
//  </Field>
//  </Fields>
//  </SendRequestResult>
//  </SendRequestResponse>
//  </soap:Body>
//  </soap:Envelope>

//  The poor design choice in the above XML is to use the same tag over and over.
//  For example "Field", "Code", and "Value".
//  Here's a much much better design, and you'll see later how the parsing is so much simpler:
// 
//  ...
//  <Fields>
//  <Message>106857</Message>
//  <AuthCodeResp>0016</AuthCodeResp>
//  <Balance>205.78</Balance>
//  </Fields>
//  ...

//  Notice it's much more compact.
//  The other poor design choice is globbing all of that information in "ProcessorData".
//  You can't use XML alone to parse the contents of that node -- you'll have to write
//  some custom string parsing code for it...  (ughhh)
// 

//  OK... so let's parse this beast...
//  We already have it loaded in an instance of the XML object.
//  Drill down to the SendRequestResult node:
$xml->FirstChild2();
$xml->FirstChild2();
$xml->FirstChild2();

//  Find the "Fields" node:

// xmlFields is a Chilkat.Xml
$xmlFields = $xml->GetChildWithTag('Fields');

//  Iterate over each field:

$numChildren = $xmlFields->NumChildren;
for ($i = 0; $i <= $numChildren - 1; $i++) {

    // xmlField is a Chilkat.Xml
    $xmlField = $xmlFields->GetChild($i);

    if ($xmlField->HasChildWithTagAndContent('Code','Message') == true) {
        print 'Message: ' . $xmlField->getChildContent('Value') . "\n";
    }

    //  Use the same logic for the other fields you want to capture...

}

//  Here's the XML parsing code if the XML were designed like this:
//  ...
//  <Fields>
//  <Unknown>1</Unknown>
//  <Message>106857</Message>
//  <AuthCodeResp>0016</AuthCodeResp>
//  <Balance>205.78</Balance>
//  </Fields>
//  ...
$success = $xml->LoadXmlFile('soap2.xml');
if ($success == false) {
    print $xml->lastErrorText() . "\n";
    exit;
}

$xml->FirstChild2();
$xml->FirstChild2();
$xml->FirstChild2();

//  Find the "Fields" node:
// xmlFields is a Chilkat.Xml
$xmlFields = $xml->GetChildWithTag('Fields');

//  Get each value:
print '-----' . "\n";
print 'Message: ' . $xmlFields->getChildContent('Message') . "\n";
print 'AuthCodeResp:' . $xmlFields->getChildContent('AuthCodeResp') . "\n";
print 'Balance: ' . $xmlFields->getChildContent('Balance') . "\n";


?>