fetchAll helper function using PDO

Question

Suppose I have a function

function fetchAll(){
  $args = func_get_args();
  $query = array_shift($args);
  $query = str_replace("%s","'%s'",$query);
  foreach ($args as $key => $val) {
    $args[$key] = mysql_real_escape_string($val);
  }
  $query = vsprintf($query, $args);
  if (!$query) return FALSE;

  $res = mysql_query($query);
  if (!$res) {
    trigger_error("db: ".mysql_error()." in ".$query);
    return FALSE;
  }
  $a = array();
  while($row = mysql_fetch_assoc($res)) $a[]=$row;
  return $a;
}

and then use it like this

$a=$db->fetchAll("SELECT * FROM users WHERE status=%s LIMIT %d,%d",$status,$start,$num);

How can I rewrite it using PDO?
Every example I can find shows only how to bind parameters directly. Should I pass variable type as well as it's value? Or make this call always 4 lines - 3 binds and execute?

Answer 1

edit: as the Colonel indicated, apparently this (no longer?) works with LIMIT clauses.

---

If you're using simple queries / are not that bothered with type:

function fetchAll(){
   $args = func_get_args();
   $query = array_shift($args);//'SELECT * FROM users WHERE status=? LIMIT ?,?'
   //you'll need a reference to your PDO instance $pdo somewhere....
   $stmt = $pdo->prepare($query);
   $stmt->execute($args);
   return $stmt->fetchAll();
}

Answer 2

Every example I can find shows only how to bind parameters directly. Should I pass variable type as well as it's value? Or make this call always 4 lines - 3 binds and execute?

You don't have to fire binds one line at a time; you can bind with an array like this:

# the data we want to insert  
$data = array('Cathy', '9 Dark and Twisty Road', 'Cardiff');  

$STH = $DBH->("INSERT INTO folks (name, addr, city) values (?, ?, ?)");  
$STH->execute($data);