PDO сделать выборку без использования "?"

$q=$this->dbh->prepare("SELECT * FROM table WHERE type=? AND name=?");
$q->execute (array ('fruit','apple'));
$row=$q-> fetch ();

$q=$this->dbh->prepare("SELECT * FROM table WHERE type=fruit AND name=apple");
$q->execute ();
$row=$q-> fetch ();

...
 function SimpleQuery($query){
   if (!$this -> connected){
    return false;    
   }
   try{
     $stmt = $this->query($query);
     if (!$stmt) return null;
     return $stmt->fetch(PDO::FETCH_ASSOC);    
   }catch (PDOException $Exception) { 
     $this -> errors[] = $Exception->getMessage();
     return null;
   }
 }
...
  $db = new database();
  var_dump( 
    $db -> SimpleQuery("select `id` from `dle_email` where name='reg_mail'") 
  );

$q=$this->dbh->prepare("SELECT * FROM `table` WHERE `type`='fruit' AND `name`='apple'");
$q->execute ();
$row=$q-> fetch ();

$query = 'SELECT * FROM `prod` WHERE `type`="phones" AND `cost`<'.$cost;
 
$q=$this->user->dbh->prepare($query);
        $q->execute();
        $row=$q->fetch();
        return print_r($row);

$q=$this->user->dbh->prepare("SELECT * FROM `prod` WHERE `type`='phones' AND `cost_ot`>".$cost_ot." AND `cost_do`<".$cost_do);
        $q->execute();
        $row=$q->fetch();
        print_r ($row);

$q=$this->user->dbh->prepare("SELECT * FROM `products` WHERE `type`=? AND `cost_ot`>? AND `cost_do`<?");
        
        $exec_array=array('phones',$cost_ot,$cost_do);
        
        $q->execute($exec_array);
        $row=$q->fetch();
        print_r ($row);

$q=$this->user->dbh->prepare('SELECT * FROM `prod` WHERE `type`="phones" AND `cost_ot` > :costFrom AND `cost_do` < :costTo ');
        $q->execute(array(':costTo'=>$cost_do, ':costFrom'=>$cost_ot));
        $row=$q->fetch(PDO::FETCH_ASSOC);
        var_dump($row);