PHP / MySQL build tree menu

Question

I am trying to build an un-oredered list menu tree from my database in PHP and MySQL.

I have an array of page objects I am returning from the db. Each page object

Answer 1

Instead of querying the database recursively, you can just pull out all entries and make the output function recursive. It's often as trivial as:

function print_list($array, $parent=0) {
    print "
";
    foreach ($array as $row) {
        if ($row->parent_id == $parent) {
            print "
$row->title";
            print_list($array, $row->id);  # recurse
            print "
";
    }   }
    print "
";
}

It's only important to nest

s into
• . Or just use HTML and leave out the closing
.

Actually this prints too many

s, so I would check for existence of sublevels and avoid printing it directly.