Print hierachical data in a parent child form unordered list php?

Question

I have data in mysql table in a parent child hierarchy like;

|---------+-----------+-------------|
| msg_id  | parent_id |    msg      |
|---------+---------         


        

Answer 1

function get_list($parent='NULL', $counter=0, $spaces=""){

    $sql = "SELECT * FROM t1 WHERE parent_id = ".parent;
    $rs[$counter] = mysql_query($sql) or die(mysql_error());
    while($row[$counter] = mysql_fetch_array($rs[$counter])){
        echo $spaces.$row[$counter]['msg']."
";
        get_list($row[$counter]['parent_id'], $counter+1, "  ".$spaces);
    }
    mysql_free_result($rs[$counter]);
}

Or, close to that.