CODEWITHSUNDEEP
phpsimplexml
Watkin Parrot
Watkin Parrot

Reputation: 53

SimpleXML find parent node key

This is very easy i'm sure but as usual being totally thick and i'm new to SimpleXML.

All I want to do is add and or edit particular notes based on a given value. example xml file: 

<site>
    <page>
     <pagename>index</pagename>
      <title>PHP: Behind the Parser</title>
      <id>abc
      <plot>
       So, this language. It's like, a programming language. Or is it a
       scripting language? All is revealed in this thrilling horror spoof
       of a documentary.
      </plot>
      </id>
      <id>def
      <plot>
      2345234 So, this language. It's like, a programming language. Or is it a
       scripting language? All is revealed in this thrilling horror spoof
       of a documentary.
      </plot>
      </id>
    </page>

     <page>
      <pagename>testit</pagename>
      <title>node2</title>
      <id>345
      <plot>
       345234 So, this language. It's like, a programming language. Or is it a
       scripting language? All is revealed in this thrilling horror spoof
       of a documentary.
      </plot>
      </id>
    </page>
    </site>

If I want to add an and to index how do I find the node key

I can add the content e.g.

$itemsNode = $site->page->pagename;

$itemsNode->addChild("id", '12121')->addChild('plot', 'John Doe');

but what I want/need to do is add content to pagename='index' or pagename='testit' I cannot see a way to get that (in example) index is key[0] and testit is key[1] without doing some form of foreach loop with a switch etc. There must be an easy way to do it? no?

so it should look something like this me thinks (but does not work otherwise would not bas asking question)

$paget = 'index' //(or testit')
if( (string) $site->page->pagename == $paget ){

$itemsNode = $site->page;

$itemsNode->addChild("id", '12121')->addChild('plot', 'John Doe');

}

Upvotes: 1

Views: 1680

Answers (2)

Leonel Machava
Leonel Machava

Reputation: 1531

EDIT:

If you know the exact position of the node you can do as follows:

$site->page[0]->addChild("id", '12121');
$site->page[0]->addChild('plot', 'John Doe');

In this case page[0] would be "index" while page[1] would be "testit".

Otherwise, you should loop across the page nodes until you find the node you want. The code below shows how you can do it:

$paget = "index";
foreach( $site->page as $page ) {
   if( $page->pagename == $paget ) {
     // Found the node
     // Play with $page as you like...
     $page->addChild("id", '12121');
     $page->addChild('plot', 'John Doe');
     break;
   }
}

Upvotes: 1

complex857
complex857

Reputation: 20753

You can use xpath to get to the nodes you want to modify:

$xml_string = '<site>...'; // your original input
$xml = simplexml_load_string($xml_string);
$pages = $xml->xpath('//page/pagename[text()="index"]/..')
if ($nodes) {
    // at least one node found, you can use it as before
    $pages[0]->addChild('id', '12121');
}

The pattern basically looks for every <pagename> under <page> where the <pagename>'s content is index and steps one up to make the <page> node returned.

Upvotes: 2

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