[PHP] Q regarding recursive function

[Bart Verbeek]

Hello,

I'm using the following function:
>>BEGIN CODE<<
$q_cat ="SELECT cat_id, cat_naam, cat_parent_id FROM cat";
$r_cat = mysql_query($q_cat) or die ("Invalid Query fout Q=cat");
if ($r_cat)


    $n=0;
    if (mysql_num_rows($r_cat) > 0)


        while ($row_cat = mysql_fetch_array($r_cat))


            $item[$row_cat[cat_id]][naam] = $row_cat[cat_naam];
            $item[$row_cat[cat_id]][id] = $row_cat[cat_id];
            $kidsof[$row_cat[cat_parent_id]][] = $row_cat[cat_id];
          }
      }
  }

#CAT-FUNCTIE
function print_tree($id=0,$spatie=0,$sid)


    global $kidsof;
    global $item;
        global $sid;
    $j=0;
    while ($j < $spatie)


        echo "&nbsp;&nbsp;";
        $j++;
      }
    $i=0;
    $spatie++;
    print ("<a href='show_cat.php?sid=".$sid."&cat_id=".$item[$id][id]."'
target=\"inhoud\">".$item[$id][naam]."</a><br>\n");
    while ($i < count($kidsof[$id]))


        print_tree($kidsof[$id][$i],$spatie,$sid);
        $i++;
      }
  }

print_tree();
>>END CODE<<

It prints the tree of categories with all childs under the parent categories
with there parents.

But when I call the function with $id=5 (I want the categorie-tree of cat 5
and children) nothing happens.
How can I change the function so the cat-tree for $id=$var1 will be shown??


Kind regards,

Bart



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