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POGetting categories from database to HTML Optgroups and options in php
 

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    <p>I am trying to get my categories from the database with their subcategories into <code>&lt;optgroup&gt;</code> and <code>&lt;option&gt;</code> tags and I want the parents to be <code>&lt;optgroup&gt;</code> tags but I can't loop through all the levels, I only get to level 2 and I can't get too far!</p> <p>This is what I got so far: </p> <pre class="lang-php prettyprint-override"><code>$con = mysql_connect($dbHost, $dbUsername, $dbPassword); if (!$con) { echo "Cannot connect to the database: " . mysql_error(); exit; } $db_selected = mysql_select_db($dbName, $con); if (!$db_selected) { echo "Can\'t use $dbName : " . mysql_error(); exit; } $query = "SELECT * FROM categories"; $result = mysql_query($query); $pidHolder = null; // To take the current parent pid in the loop $optOpen = false; // Check that optgroup tag is opened while ($line = mysql_fetch_array($result, MYSQL_ASSOC)) { if ($line['parent_id'] == 0 &amp;&amp; $line['cat_id'] == 0) continue; if ($line['parent_id'] == 0) { if ($optOpen) { echo '&lt;/optgroup&gt;'; $optOpen = false; } echo "&lt;optgroup value=" . $line['cat_name'] . "\" label=\"" . $line['cat_name'] . "\"&gt;"; $pidHolder = $line['cat_id']; $optOpen = true; continue; } else if (isset($pidHolder) &amp;&amp; $pidHolder == $line['parent_id']) { echo '&lt;option value="' . $line['cat_id'] . '"&gt;' . $line['cat_name'] . '&lt;/option&gt;\n'; continue; } } mysql_close(); </code></pre> <p>What's the problem with my code? and what do I need to loop through the rest of children?</p>
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