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PORecursive loop for category
 

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  1. PORecursive loop for category
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    <p>I'm trying to implement a category system on my website. The problem is that a category can have child. So far, my table <code>category</code> looks like that : </p> <pre><code>id, name, parent_id </code></pre> <p>So far, I made a loop, but it only works for 2 levels. Here is my code : </p> <pre><code>for($i=0;$i&lt;count($data);$i++){ $tree[$data[$i]-&gt;name] = array(); for($j=0;$j&lt;count($data);$j++){ if($data[$j]-&gt;parent_id == $data[$i]-&gt;id){ $tree[$data[$i]-&gt;name][] = $data[$j]-&gt;name; } } } </code></pre> <p>It return me an array as it : </p> <pre><code>Array ( [0] =&gt; Array ( [1] =&gt; Cat1 [children] =&gt; Array ( [12] =&gt; sub cat 1 [13] =&gt; sub cat 2 [14] =&gt; sub cat 3 ) ) [1] =&gt; Array ( [2] =&gt; Cat2 ) [2] =&gt; Array ( [3] =&gt; Cat3 ) ) </code></pre> <p>How can I make it efficient and recursive to have something more like : </p> <pre><code>Array ( [0] =&gt; Array ( [1] =&gt; Cat1 [children] =&gt; Array ( [12] =&gt; sub cat 1 [13] =&gt; sub cat 2 [14] =&gt; sub cat 3 [children] =&gt; Array ( [1] =&gt; sub sub cat 1 ) ) ) [1] =&gt; Array ( [2] =&gt; Cat2 ) [2] =&gt; Array ( [3] =&gt; Cat3 ) ) </code></pre> <p>Thanks for your help</p> <p><em><strong>EDIT</em></strong></p> <p>I'm working on Zend, and it return me the <code>data</code> as it : </p> <pre><code>Zend_Db_Table_Rowset Object ( [_data:protected] =&gt; Array ( [0] =&gt; Array ( [id] =&gt; 1 [name] =&gt; Cinema [type] =&gt; category [slug] =&gt; cinema [parent_id] =&gt; -1 ) [1] =&gt; Array ( [id] =&gt; 2 [name] =&gt; Horror [type] =&gt; category [slug] =&gt; horror [parent_id] =&gt; 1 ) </code></pre>
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