Hey everyone. I'm looking for assistance/suggestions/answers on how to build a select dropdown box from data that needs to be pulled recursively from a MySQL database. Basically the situation is mainly for a dicussion thread system type of thing where I have categories nested inside categories, nested inside categories... Anyway, I want to be able to build a drop down box containing all the categories indented underneath it's parent category to look something similar to this:
------------------------- Top Level Category - Nested Category - Lower level - Etc.... Top Level Category - Nested Category Top Level Category -------------------------
Then the user will be able to select one from the dropdown menu. I have all the categories stored in a MySQL database called site_categories. The table is setup like this:
__________________________________ | Cat_ID | Cat_Parent | Cat_Name | |---------------------------------------------| | 1 | 0 | Top Level 1 | |---------------------------------------------| | 2 | 1 | Nested 1 | |---------------------------------------------| | 3 | 0 | Top Level 2 | |---------------------------------------------| | 4 | 2 | Nested 2 | |---------------------------------------------|
Sorry for the bad pictures you hopefully you get the idea. Anything with a 0 Cat_Parent is a Top Level category. Then the others are all nested inside other categories that have the same Cat_ID as the nested categories Cat_Parent. I basically need help creating a properly indented dropdown menu box using this structure from the database. I assume I'm gonna have to use some sort of recursion here, but I'm not sure how to go about this. Please help if you can.
Thanks,
Matt http://sweetphp.com
I'd suggest using a recursive function. (I'm assuming you're using PEAR DB...)
function getSelect(&$db, $catParent = 0, $indent = '') {
$sth = $db->query('SELECT * FROM categories WHERE Cat_Parent = '.$catParent);
while($rec = $sth->fetchRow()) {
echo '<option value="'.$rec['Cat_ID'].'">'.$indent.$rec['Cat_Name'].'</option>';
getSelect($db, $rec['Cat_ID'], $indent.' ');
}
}
$db = DB::connect('mysql://user:[EMAIL PROTECTED]/db');
$db->setFetchMode(DB_FETCHMODE_ASSOC);
echo '<select name="selectBox">';
getSelect($db);
echo '</select>';I think that will work ;-)
-- paperCrane <Justin Patrin>
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