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POGet ancestor node with PHP and xpath
 

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    <p>Please forgive if the following is a bit muddled, I've been killing myself trying to work this out.</p> <p>This is a chunk of XML (exported from a much large site) that I am using to create a category tree for a mini-CMS. Once I've got the value and name of the node, which is no problem, I also need to get the 'parent' each node, that is, the node preceding it which is above it in the hierarchy.</p> <pre><code> &lt;productCategory&gt; &lt;genericName&gt;DigitalCinema&lt;/genericName&gt; &lt;productCategories&gt; &lt;productCategory&gt; &lt;genericName&gt;DCinemaProj&lt;/genericName&gt; &lt;productModels&gt; &lt;productModel&gt;ProjProd-1&lt;/productModel&gt; &lt;productModel&gt;ProjProd-2&lt;/productModel&gt; &lt;productModel&gt;ProjProd-3&lt;/productModel&gt; &lt;productModel&gt;ProjProd-4&lt;/productModel&gt; &lt;/productModels&gt; &lt;/productCategory&gt; &lt;productCategory&gt; &lt;genericName&gt;DCinemaLens&lt;/genericName&gt; &lt;/productCategory&gt; &lt;/productCategories&gt; &lt;/productCategory&gt; </code></pre> <p>For example, for the productCategory-genericName <strong>DCinemaLens</strong>, I need to be able to grab the parent as <strong>DigitalCinema</strong>, and similarly for the individual <strong>productModel</strong> nodes, where the parent would be <strong>DCinemaProj</strong>.</p> <p>I've tried various different queries in xpath using ancestor, previous-sibling and parent and I still can't see to grab the node I need.</p> <p>Here is my code as it stands from giving up on my attempts a few minutes ago.</p> <pre><code>if ($xml-&gt;xpath('//productCategories')) { foreach($xml-&gt;xpath('//genericName | //productModel') as $genericName){ echo "&lt;p align='center'&gt;$genericName"; $type = $genericName-&gt;getName(); echo " - (" . $type . ") "; $derp = $xml-&gt;xpath("ancestor::productCategory[1]/genericName"); echo $derp; echo '&lt;/p&gt;'; } } </code></pre> <p>I've also had some success getting information in an array, but it always just returns every value in the XML again.</p> <pre><code>$key = 'genericName'; $derpgleep = $derp[$key]; echo 'Derp= ' . $derpgleep; print_r($derp); </code></pre> <p>Hopefully there is a really easy solution I am overlooking. I hope I have been clear.</p>
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    1. USEmiliano Poggi
    1. USPenguinOfwar
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    1. COGood question, +1. See my answer for a complete, short and simple XPath expression that selects the wanted, called "parent", node.
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      1. USDimitre Novatchev
 

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