$len = strlen($ca_id);

function get_parents($len, $ca_id) {

    global $g5;

    $size = $len/2;
    
    $i = 1;
    $j = 0;
    $style = '';
    while($i<$size) {
        $j = $j + 2;
        $len_calc = $len - $j;
        $cut_id = substr($ca_id, 0, $len_calc);
        $sql = " select ca_name from {$g5['g5_shop_category_table']} where ca_id = {$cut_id} and length(ca_id) = $len_calc ";
        $result = sql_fetch($sql);

        if ($result['ca_name']) {
            return $result['ca_name'];
            break;
        }
    }
    return false;
}