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POPHP XML - How to build a tree of xml nodes that are at at same level with parent child relationship
 

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  1. POPHP XML - How to build a tree of xml nodes that are at at same level with parent child relationship
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    <p>I am trying to read the xml from a file and display them just like a tree. I am using PHP and I want to get the output as shown below. The content of xml file is as follows... </p> <pre><code>&lt;Categories&gt; &lt;Category&gt; &lt;Id&gt;1&lt;/Id&gt; &lt;Name&gt;Parent 1&lt;/Name&gt; &lt;ParentId&gt;1&lt;/ParentId&gt; &lt;ParentName&gt;Parent 1&lt;/ParentName&gt; &lt;/Category&gt; &lt;Category&gt; &lt;Id&gt;2&lt;/Id&gt; &lt;Name&gt;Child 1&lt;/Name&gt; &lt;ParentId&gt;1&lt;/ParentId&gt; &lt;ParentName&gt;Parent 1&lt;/ParentName&gt; &lt;/Category&gt; &lt;Category&gt; &lt;Id&gt;3&lt;/Id&gt; &lt;Name&gt;Child 2&lt;/Name&gt; &lt;ParentId&gt;1&lt;/ParentId&gt; &lt;ParentName&gt;Parent 1&lt;/ParentName&gt; &lt;/Category&gt; &lt;Category&gt; &lt;Id&gt;8&lt;/Id&gt; &lt;Name&gt;Grand Child 1 -1&lt;/Name&gt; &lt;ParentId&gt;2&lt;/ParentId&gt; &lt;ParentName&gt;Child 1&lt;/ParentName&gt; &lt;/Category&gt; &lt;Category&gt; &lt;Id&gt;12&lt;/Id&gt; &lt;Name&gt;Parent 2&lt;/Name&gt; &lt;ParentId&gt;12&lt;/ParentId&gt; &lt;ParentName&gt;Parent 2&lt;/ParentName&gt; &lt;/Category&gt; &lt;Category&gt; &lt;Id&gt;15&lt;/Id&gt; &lt;Name&gt;Child 2-1&lt;/Name&gt; &lt;ParentId&gt;12&lt;/ParentId&gt; &lt;ParentName&gt;Parent 2&lt;/ParentName&gt; &lt;/Category&gt; &lt;/Categories&gt; &lt;/CategoryList&gt; </code></pre> <p>I want to read this xml file (I know how to read it) But I can not format it like follows... How would I get all the nodes that are the top most parents and get child of those parent nodes (using recursion or what so ever)</p> <pre><code>&lt;ul&gt; &lt;li&gt;Parent 1 &lt;ul&gt; &lt;li&gt; Child 1 &lt;ul&gt; &lt;li&gt;Grand Child 1 -1&lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; &lt;li&gt; Child 2&lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; &lt;li&gt;Parent 2 &lt;ul&gt; &lt;li&gt;Child 2-1 &lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; &lt;/ul&gt; </code></pre> <p>Please any help will be greatly appreciated....</p> <p><strong>Edit*</strong> What I have done so far...</p> <pre><code>$xml= simplexml_load_string('myxmlstring'); get_categories($xml, 0); function get_categories($xml, $id) { if ($id==0) $Categories = $xml-&gt;xpath('Categories/Category[ParentId=Id]'); else $Categories = $xml-&gt;xpath('Categories/Category[ParentId='.$id.' and Id!='.$id.']'); echo '&lt;ul id="catlist'.$id.'"&gt;'; foreach($Categories as $Category) { echo "&lt;li&gt;ID: " . $Category-&gt;Id . "--Name: " . $Category-&gt;Name; get_categories($xml, $Category-&gt;Id); echo "&lt;/li&gt;"; } echo "&lt;/ul&gt;"; } </code></pre> <p>Now I just want to confirm that this is the optimal solution. or someone can come with better idea...</p>
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