Recursive tree traversal with mysql through PHP

Question

I am creating a questionnaire for a client that requires the questions to be organized by 3 layers of levels. I\'ve successfully created the U.I. however I\'ve been trying f

Answer 1

Do this recursivly:

function printChildQuestions($parentid) {
  $sql="SELECT * FROM pB_test WHERE parentID=$parentid";
  $result=mysql_query($sql);
  $i=0;
  while (true) {
    $row=mysql_fetch_array($result);
    if (!$row) break;
    if ($i==0) echo "
";
    $i=1;
    echo '
'.$row['id'].' '.$row['description'].' '.$row['parentId'].'
';
    printChildQuestions($row['id']);
  }
  if ($i>0) echo '
';
}

printChildQuestions(0);