PHP XML XPATH node element iteration and inserting into array

Question

Ok, so I thought I had this nailed , but sadly not . I have this XML:

//XML
this is root--> <story> 
<article>
<title>my title </title>
<img>my image </img>
<link>my link </link
</article>
</story>

and then this PHP:

//php
$dom = new DOMDocument('1.0', 'UTF-8');
$dom->loadXML($_SESSION['xml']);
$xpath = new DOMXPath($dom);
$query = $xpath->query('//section/article');

foreach($query as $article  ):
                $currentTitle = $article->title ;
//edit - mistake in code - $article used for all 
                //$imagearray =  $currentimg->img ;
                //$linkarray =  $currentlink->link ;
                array_push( $availAds,$currentTitle,$imagearray,$linkarray );
        endforeach;

So what I'm trying to do is get the 'Title' 'Img' and 'Link' values and insert them into a pre existing array. The array already outputs fine with the previously entered values, but I then need to be able to output the results of the updated array in this way:

    printf(
                    '<input name="ads[%1$s][title]" value="%2$s" style="width:310px;" /><br />',
                    $availAd['image'],
                    $availAd['title']
                );

The issue is right now , the foreach returns NULL for $currentTitle , $imagearray and $linkarray

And what is the problem exactly? Sorry, I must not have read your question well enough. — 0x1F602
– 0x1F602, Commented Mar 24, 2011 at 15:20
@BobFlemming: Retagging to xpathengines because this refers to data type of specific XPath engine's result. — user357812
– user357812, Commented Mar 24, 2011 at 15:25
the issue is that $currentimg->img etc. doesnt work. It comes up as NULL for every value in the Foreach — BobFlemming
– BobFlemming, Commented Mar 24, 2011 at 15:29
sorry, that was a mistake. All of those are "$article" not $currentimg or $currentlink — BobFlemming
– BobFlemming, Commented Mar 24, 2011 at 15:36

VolkerK · Accepted Answer · 2011-03-24 16:21:29Z

As Gordon said: you need simplexml instead of domdocument/domxpath if you want to access child elements like $parent->childelements.
And you probably want to "group" the elements you put into the array for each article element, i.e. instead of
array_push($arr, $x, $y, $z);
you probably want
array_push($arr, array($x, $y, $z));

self-contained example:

<?php
$doc = getDoc();
$arr = foo($doc);
foreach($arr as $ad) {
  echo $ad['title'], " ", $ad['img'], "\n";
}

function foo(SimpleXMLElement $doc) {
  $availAds = array();
  $query = '//section/article';
  foreach( $doc->xpath($query) as $article ) {
    $currentTitle = $article->title ;
  //edit - mistake in code - $article used for all 
                  //$imagearray =  $currentimg->img ;
                  //$linkarray =  $currentlink->link ;
    array_push( $availAds, array(
      'title'=>(string)$article->title, // without the (string) cast 
      'img'=>(string)$article->img,  // you'd store simplexmlelement instances
      'link'=>(string)$article->link  // which _might or might not_ be what you want
    ));
  }
  return $availAds;
}

function getDoc() {
  return new SimpleXMLElement( <<< eoxml
<story>
  <section>
    <article>
      <title>title 1.1</title>
      <img>my image 1.1</img>
      <link>my link 1.1</link>
    </article>
    <article>
      <title>title 1.2</title>
      <img>my image 1.2</img>
      <link>my link 1.2</link>
    </article>
  </section>
  <section>
    <article>
      <title>title 2.1</title>
      <img>my image 2.1</img>
      <link>my link 2.1</link>
    </article>
  </section>
</story>
eoxml
  );
}

prints

title 1.1 my image 1.1
title 1.2 my image 1.2
title 2.1 my image 2.1

thanks! With a bit of modification this was exactly what I needed to do.

Craig Sefton · Accepted Answer · 2011-03-24 16:20:12Z

0

Try something like this:

$xml="<story>
<article>
<title>my title</title>
<img>my image</img>
<link>my link</link>
</article>
</story>
";

$xml = new SimpleXMLElement($xml);

$availAds = array();

foreach($xml->article as $article):
    $currentTitle = (string)$article->title ;
    array_push( $availAds, $currentTitle );
endforeach;

print_r($availAds);

answered Mar 24, 2011 at 16:20

Craig Sefton

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