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up vote 0 down vote favorite

(after deleting an XML node) the following gets a list of <picture> 'id' attribute values:

$objXML = new SimpleXMLElement(XML_FILE_NAME, null, true);
$picture = $objXML->xpath('picture');
$arrayCurrent = array();
foreach($picture as $value) {
    $arrayCurrent[] = (string)$value['id'];
}
sort($arrayCurrent); // required as XML nodes not in numerical 'id' order
print_r($arrayCurrent);

Which returns the following:

Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 5 [5] => 6 [6] => 7 [7] => 8 )

I want to set each id to the value of its current key like so:

Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 [6] => 6 [7] => 7 )

I've been messing about with this for a while but I wondered if there is a simple way to achieve this?

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1 Answer 1

up vote 1 down vote

If you explicitly assign index keys and use asort, I think you'll get what you want.

...
foreach($picture as $value) {
    $arrayCurrent[$value['id']] = (string)$value['id'];
}
asort($arrayCurrent); // required as XML nodes not in numerical 'id' order
...

Second try.. still not sure I understand you, but hey :) Instead of the foreach loop:

for($i = 0; $i < sizeof($picture); $i++)
{
  $picture[$i]['id'] = $i;
  $arrayCurrent[$i] = $i; // Not sure why you'd still want this, in this case.
}
share|improve this answer
    
Hmm, on a second thought, I think I might have misunderstood. You want to actually change the DOM elements to give them whatever key they are assigned when added to the array. Sorry! –  Frode Nov 10 '10 at 10:56
    
Basically I have an XML file to which new nodes are added and given a new id number = (number of current nodes+1). In my example I deleted a node (id 4), then if I add a new node it will be given 'id 8', it would cause conflict with previous node already with id of 8. So each time I delete a node I must also re-index the id's. –  Andy Nov 10 '10 at 11:19
    
Updated my answer.. any better? :) –  Frode Nov 10 '10 at 13:42
    
Updated code seemed to be more like what I needed. I'm finding that the element with the highest ID in the array gets its ID changed to that of the deleted ID. Maybe I should post my updated code... –  Andy Nov 10 '10 at 16:09
    
created a new question to hopefully explain it better: stackoverflow.com/questions/4157494/… –  Andy Nov 11 '10 at 19:18

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