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POProblem to generate nested ul lists using PHP
 

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  1. POProblem to generate nested ul lists using PHP
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    <p>I am working on a front-end web app where a nested unordered list would be used for the jQuery plugin mcdropdown.</p> <p>Here is the data structure from PHP: a nested array of arrays :</p> <pre><code>Array ( [0] =&gt; Array ( [fullpath] =&gt; ../foil/alphanumeric/ [depth] =&gt; 0 ) [1] =&gt; Array ( [fullpath] =&gt; ../foil/alphanumeric/letters/ [depth] =&gt; 1 ) [2] =&gt; Array ( [fullpath] =&gt; ../foil/alphanumeric/numbers/ [depth] =&gt; 1 ) [3] =&gt; Array ( [fullpath] =&gt; ../foil/alphanumeric/numbers/symbols/ [depth] =&gt; 2 ) ) </code></pre> <p>Basically, I took the excellent answer from <a href="https://stackoverflow.com/questions/1310649/getting-a-modified-preorder-tree-traversal-model-nested-set-into-a-ul">this question on SO</a>, modified it a bit :</p> <pre><code>global $fullpaths; // $fullpaths contains the above data structure in print_r $result = ''; $currentDepth = -1; while(!empty($fullpaths)) { $currentNode = array_shift($fullpaths); if($currentNode['depth'] &gt; $currentDepth) { $result .='&lt;ul&gt;'; } if($currentNode['depth'] &lt; $currentDepth) { $result .=str_repeat('&lt;/ul&gt;', $currentDepth - $currentNode['depth']); } $result .= '&lt;li&gt;'. $currentNode['fullpath'] .'&lt;/li&gt;'; $currentDepth = $currentNode['depth']; if(empty($fullpaths)) { $result .= str_repeat('&lt;/ul&gt;', 1 + $currentDepth); } } print $result; </code></pre> <p>and got the following output:</p> <pre><code>&lt;ul&gt; &lt;li&gt;../foil/alphanumeric/&lt;/li&gt; &lt;ul&gt; &lt;li&gt;../foil/alphanumeric/letters/&lt;/li&gt; &lt;li&gt;../foil/alphanumeric/numbers/&lt;/li&gt; &lt;ul&gt; &lt;li&gt;../foil/alphanumeric/numbers/symbols/&lt;/li&gt; &lt;/ul&gt; &lt;/ul&gt; &lt;/ul&gt; </code></pre> <p>Which cannot be accepted by the mcdropdown jQuery plugin, it expects something like this:</p> <pre><code>&lt;li rel="1"&gt; 'Alphanumeric' &lt;ul&gt; &lt;li rel="2"&gt;'Letters'&lt;/li&gt; &lt;li rel="3"&gt;'Numbers' &lt;ul&gt; &lt;li rel="4"&gt;'Symbols'&lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; </code></pre> <p>To be frank, I don't quite understand how the answer from that question works, I have been trying to modify that solution to cope with my situation, but still failed.</p> <p>Any help and suggestion is much appropriated in advance.</p>
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