using For-Loop when XML child node name contains variable

[desmod]

Currently I am able to use for-loop to get values for each pair of Channel and APcount because I know how many pairs are sent in XML. The "ResultNumberOfEntries" gives me that value and all is good. The question I have is, how would I be able to use for-loop if the ResultNumberOfEntries is not passed.

 

Here is my code that works fine as long as ResultNumberOfEntries is known.

<?
$feed = file_get_contents("test.xml");
$xml = new SimpleXmlElement($feed);
$xml->registerXPathNamespace("ns", "urn:broadband-forum-org:ipdr:tr-232-1-0");

$number_of_entries = $xml->xpath("//ns:BulkData[ns:Name='InternetGatewayDevice.LANDevice.1.WLANConfiguration.X_181BEB_ChannelDiagnostics.Result.ResultNumberOfEntries']/ns:Value");
$number_of_entries = $number_of_entries[0];

for ($i = 1; $i <= $number_of_entries; $i++) {
 $channel = $xml->xpath("//ns:BulkData[ns:Name='InternetGatewayDevice.LANDevice.1.WLANConfiguration.X_181BEB_ChannelDiagnostics.Result.{$i}.Channel']/ns:Value");
 $channel = $channel[0];
 $apcount = $xml->xpath("//ns:BulkData[ns:Name='InternetGatewayDevice.LANDevice.1.WLANConfiguration.X_181BEB_ChannelDiagnostics.Result.{$i}.APcount']/ns:Value");
 $apcount = $apcount[0];
 echo $channel.' : '.$apcount;
 echo "<br />";
}
?>

Here is the test.xml file:

<?xml version = "1.0" encoding = "UTF-8"?>
<ipdr:IPDRDoc xmlns:ipdr="http://www.ipdr.org/namespaces/ipdr"
xmlns="urn:broadband-forum-org:ipdr:tr-232-1-0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="urn:broadband-forum-org:ipdr:tr-232-1-0 tr-232-1-0-0-serviceSpec.xsd http://www.ipdr.org/namespaces/ipdr http://www.ipdr.org/public/IPDRDoc3.5.1.xsd"
docId="74697373-6f74-7878-7878-746973736f74"
creationTime="2013-06-11T06:02:55.153Z"
IPDRRecorderInfo="IPDR Collector" version="3.5.1">
<ipdr:IPDR xsi:type="BulkDataReport">
<BulkData>
    <Name>InternetGatewayDevice.LANDevice.1.WLANConfiguration.X_181BEB_ChannelDiagnostics.Result.ResultNumberOfEntries</Name>
    <Value>3</Value>
</BulkData>
<BulkData>
    <Name>InternetGatewayDevice.LANDevice.1.WLANConfiguration.X_181BEB_ChannelDiagnostics.Result.1.Channel</Name>
    <Value>1</Value>
</BulkData>
<BulkData>
    <Name>InternetGatewayDevice.LANDevice.1.WLANConfiguration.X_181BEB_ChannelDiagnostics.Result.1.APcount</Name>
    <Value>3</Value>
</BulkData>
<BulkData>
    <Name>InternetGatewayDevice.LANDevice.1.WLANConfiguration.X_181BEB_ChannelDiagnostics.Result.2.Channel</Name>
    <Value>6</Value>
</BulkData>
<BulkData>
    <Name>InternetGatewayDevice.LANDevice.1.WLANConfiguration.X_181BEB_ChannelDiagnostics.Result.2.APcount</Name>
    <Value>8</Value>
</BulkData>
<BulkData>
    <Name>InternetGatewayDevice.LANDevice.1.WLANConfiguration.X_181BEB_ChannelDiagnostics.Result.3.Channel</Name>
    <Value>11</Value>
</BulkData>
<BulkData>
    <Name>InternetGatewayDevice.LANDevice.1.WLANConfiguration.X_181BEB_ChannelDiagnostics.Result.3.APcount</Name>
    <Value>6</Value>
</BulkData>
</ipdr:IPDR >
<ipdr:IPDRDoc.End count="1" endTime="2013-06-11T06:02:55.207Z"></ipdr:IPDRDoc.End>
</ipdr:IPDRDoc>

This is the result I am expecting:

1 : 3 
6 : 8 
11 : 6

[requinix]

Is that even a possibility?

 

What request are you sending? I'm trying to find documentation about the response but it's practically impossible without knowing what the request is.

[desmod]

Sorry if my question was perhaps not clear.  Lets say that I am getting XML data of cars sold on the end of each day and that looks like this:    

 

<?xml version = "1.0" encoding = "UTF-8"?>
<ipdr:IPDRDoc xmlns:ipdr="http://www.ipdr.org/namespaces/ipdr"
xmlns="urn:broadband-forum-org:ipdr:tr-232-1-0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="urn:broadband-forum-org:ipdr:tr-232-1-0 tr-232-1-0-0-serviceSpec.xsd http://www.ipdr.org/namespaces/ipdr http://www.ipdr.org/public/IPDRDoc3.5.1.xsd"
docId="74697373-6f74-7878-7878-746973736f74"
creationTime="2013-06-11T06:02:55.153Z"
IPDRRecorderInfo="Car Collector" version="3.5.1">
<ipdr:IPDR xsi:type="CarDataReport">
<BulkData>
    <Name>car.1.make</Name>
    <Value>Honda</Value>
</BulkData>
<BulkData>
    <Name>car.1.model</Name>
    <Value>Civic</Value>
</BulkData>
<BulkData>
    <Name>car.2.make</Name>
    <Value>Toyota</Value>
</BulkData>
<BulkData>
    <Name>car.2.model</Name>
    <Value>Camry</Value>
</BulkData>
<BulkData>
    <Name>car.3.make</Name>
    <Value>Ford</Value>
</BulkData>
<BulkData>
    <Name>car.3.model</Name>
    <Value>Escort</Value>
</BulkData>
</ipdr:IPDR >
<ipdr:IPDRDoc.End count="1" endTime="2013-06-11T06:02:55.207Z"></ipdr:IPDRDoc.End>
</ipdr:IPDRDoc>

So lets say that I want to get the values for each Car Make/Model.  If XML will always show me data for 3 cars than I can use for-loop and use condition 

 

<? for ($i = 1; $i <= 3; $i++){

$car_make = $xml->xpath("//ns:BulkData[ns:Name='car.{$i}.make']/ns:Value");
$car_make = $car_make[0];

$car_model = $xml->xpath("//ns:BulkData[ns:Name='car.{$i}.model']/ns:Value");
$car_model = $car_model[0];

echo $car_make'. .'$car_model'. <br> .'; 
}
?>

But since my XML will show me different number of cars, the script above will not work.  

 

So far I came with this workaround.  I just put some high number that I know it will not be exceeded and than break the loop when $car_model value is empty.  I was just hoping there is more elegant solution to my problem.

 

<? for ($i = 1; $i <= 1000; $i++){

$car_make = $xml->xpath("//ns:BulkData[ns:Name='car.{$i}.make']/ns:Value");
$car_make = $car_make[0];

$car_model = $xml->xpath("//ns:BulkData[ns:Name='car.{$i}.model']/ns:Value");
$car_model = $car_model[0];

  if ($car_model == ""){
  break;
  }
  else {
  echo $car_make'. .'$car_model'. <br> .'; 
  } 

}
?>