(PHP Extension) Find XML Element where Attribute = Value

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Finds an XML element at a particular location where an attribute has a specified value.

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<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// We have the following XML and wish to find the value of the time attribute where msg = "alert-from".

// <cdr id="4e5d3e7f41bf6201ad81000c29703270" e164="6207">
//     <user>
//         <grp name="wfln" mode="active"/>
//     </user>
//     <event msg="setup-to" time="287069" e164="5034"/>
//     <event msg="alert-from" time="287069" e164="5034"/>
//     <event msg="rel-to" time="287079" e164="5034"/>
// </cdr>

// First, build the above XML:

$xml = new CkXml();
$xml->put_Tag('cdr');
$xml->AddAttribute('id','4e5d3e7f41bf6201ad81000c29703270');
$xml->AddAttribute('e164','6207');
$xml->UpdateAttrAt('user|grp',true,'name','wfln');
$xml->UpdateAttrAt('user|grp',true,'mode','active');
$xml->UpdateAttrAt('event',true,'msg','setup-to');
$xml->UpdateAttrAt('event',true,'time','287069');
$xml->UpdateAttrAt('event',true,'e164','5034');
$xml->UpdateAttrAt('event[1]',true,'msg','alert-from');
$xml->UpdateAttrAt('event[1]',true,'time','287069');
$xml->UpdateAttrAt('event[1]',true,'e164','5034');
$xml->UpdateAttrAt('event[2]',true,'msg','rel-to');
$xml->UpdateAttrAt('event[2]',true,'time','287079');
$xml->UpdateAttrAt('event[2]',true,'e164','5034');

// Show that we have the above XML
print $xml->getXml() . "\n";

// Find the element where msg = "alert-from"
// This updates the xml object's reference to the found element (if successful).
$notUsed = $xml->chilkatPath('/A/event,msg,alert-from|$');
if ($xml->get_LastMethodSuccess() == false) {
    print 'Not found.' . "\n";
    exit;
}

// Get the value of the "time" attribute.
print 'time = ' . $xml->getAttrValue('time') . "\n";

// Restore the xml object's internal reference to the root of the XML document
$xml->GetRoot2();

?>