<?php
include "config.php";

function punya_child($id_kategori = NULL)
{
    $result = mysql_query('SELECT COUNT(id_kategori) AS jumlah_child FROM category WHERE id_parent = \''.$id_kategori.'\'');
    $data = mysql_fetch_assoc($result);
    if($data['jumlah_child'] > 0) return TRUE;
    return FALSE;
}

function hirarki($id_kategori = NULL)
{
    if($id_kategori === NULL)
    {
        $result_top_level = mysql_query('SELECT * FROM category WHERE id_parent IS NULL');
        if(mysql_num_rows($result_top_level) > 0)
        {
            echo '<ul class="category">';
            while($row_top_level = mysql_fetch_assoc($result_top_level))
            {
                echo "<li class='category'>", $row_top_level['kategori'];
                if(punya_child($row_top_level['id_kategori']))
                {
                    hirarki($row_top_level['id_kategori']);
                }
                echo '</li>';
            }
            echo '</ul>';
        }
    }
    else
    {
        $result_child = mysql_query('SELECT * FROM category WHERE id_parent = \''.$id_kategori.'\'');
        if(mysql_num_rows($result_child) > 0)
        {
            echo '<ul class="subcategory">';
            while($row_child = mysql_fetch_assoc($result_child))
            {
                echo "<li><a href='cat.php?kategori=$row_child[kategori]'>", $row_child['kategori'];

                if(punya_child($row_child['id_kategori']))
                {
                     hirarki($row_child['id_kategori']);
                }
                echo '</li>';
            }
            echo '</ul></a>';
        }
    }

}
hirarki();
?>