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Getting hierarchal records


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This is a simple task, but my brain apparently no longer works.


I have a nested category structure - each record can have a parent, that is the id of another category.




id name parent

1 Sporting Goods 0

2 Golf Clubs 1

3 Baseballs 1

4 Shirts 0


All I want to do is write a function that takes an id and gets all the children below it. It should be like 2 functions, with one being recursive... like 10 lines total...


  function has_subcategories($catid){
      $result = $this->db->query("select * from `categories` where `Owner`=$catid and `active`=1 and `deleted`=0");
      return $result->num_rows() ? true : false;
    function get_subcategories($catid){
        $result = $this->db->query("select * from `categories` where `Owner`='$catid' and `active`=1 and `deleted`=0");
        $children = array();
        foreach($result->result_array() as $subcat){
            //echo $subcat['id'].'-'.$this->has_subcategories($subcat['id'])."<br>";
                $children = array_merge($children, $this->get_subcategories($subcat['id']));
            } else {
                $children[] = $subcat['id'];
        return $children;


Anyone see what I'm doing wrong? I've wrote this exact function before, not sure how I'm screwing it up.

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