Multi level php array xml writer?

Question

I've recently tried a simple thing with php xml writer to output db calls in a more cross-platform way - using xml. The thing is, I'd like to transform my multi is_array and foreach loops into some kind of loop:

    $arr = array('param'=>'value','otherparam'=>array('vegetable'=>'tomato'));
    $xml = new XMLWriter();
    $xml->openURI("php://output");
    $xml->startDocument();
    $xml->setIndent(true);
    $xml->startElement('whmseo');
    $xml->startElement($module);
    foreach($arr as $fkey=>$fel)
    {
        if(is_array($fel))
        {
            foreach($fel as $skey=>$sel)
            {
                if(is_array($sel))
                {
                    foreach($sel as $tkey=>$tel)
                    {
                        $xml->startElement($tkey);
                        $xml->writeRaw($tel);
                        $xml->endElement();
                    }
                }
                else
                {
                    $xml->startElement($skey);
                    $xml->writeRaw($sel);
                    $xml->endElement();
                }
            }
        }
        else
        {
            $xml->startElement($fkey);
            $xml->writeRaw($fel);
            $xml->endElement();
        }
    }
    $xml->endElement();
    $xml->endElement();
    header('Content-type: text/xml');
    $xml->flush();
    exit();

How to do that in some simple iteration?

You want to make it recursive?

OIS
– OIS

2013-09-30 19:27:53 +00:00
Commented Sep 30, 2013 at 19:27 — OIS
– OIS, Commented Sep 30, 2013 at 19:27
Yes, that's right :-)

jakubplus
– jakubplus

2013-09-30 19:30:22 +00:00
Commented Sep 30, 2013 at 19:30 — jakubplus
– jakubplus, Commented Sep 30, 2013 at 19:30

OIS · Accepted Answer · 2013-09-30 21:15:49Z

1

Something like this? I can't test against XMLWriter atm..

function xmlrecursive($xml, $key, $value) {
    if (is_array($value)) {
        $xml->startElement($key);
        foreach ($value as $key => $sub) {
            xmlrecursive($xml, $key, $sub);
        }
        $xml->endElement();
    } else {
        $xml->startElement($key);
        $xml->writeRaw($value);
        $xml->endElement();
    }
}

$arr = array('param'=>'value','otherparam'=>array('vegetable'=>'tomato'));
$xml = new XMLWriter();
$xml->openURI("php://output");
$xml->startDocument();
$xml->setIndent(true);
$xml->startElement('whmseo');
//$xml->startElement($module);
foreach ($value as $key => $sub) {
    xmlrecursive($xml, $key, $sub);
}
//$xml->endElement();
$xml->endElement();
header('Content-type: text/xml');
$xml->flush();
exit();

Output:

<?xml version="1.0"?>
<whmseo>
 <test>
  <param>value</param>
  <otherparam>
   <vegetable>tomato</vegetable>
  </otherparam>
 </test>
</whmseo>

edited Sep 30, 2013 at 21:15

answered Sep 30, 2013 at 19:45

OIS

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1 Comment

jakubplus Over a year ago

Well, it seems that according to this part: foreach($value as $key... it takes second-level array element, and does not process keys i.e.: <first> <second> <third>db</third> // This should contain array <forth>1</forth> </second> </first> And I think that "foreach ($value as $key => $sub) {" should be "foreach ($arr as $key => $sub) {" according to my question, am I right?

Mike Brant · Accepted Answer · 2013-09-30 19:51:26Z

0

Not a direct answer to your question, but I would highly suggest using JSON. It is just as cross-platform compatible as XML, yet less verbose and less cumbersome to work with. It is pretty much the serialization method of choice for modern web services.

With JSON, your code would be this:

header('Content-type: application/json');
$arr = array('param'=>'value','otherparam'=>array('vegetable'=>'tomato'));
echo json_encode($arr);

answered Sep 30, 2013 at 19:51

Mike Brant

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1 Comment

jakubplus Over a year ago

Well I do use json_encode json_decode across my works but this time I need to use xml in particular. Thanks for reminding :-)

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