Requete sql php

     $rp = new mainActions;
     $result = $rp->AfficherMembres();
     foreach($result as $data){
      $rp2 = new mainActions;
      $result2 = $rp2->AfficherMembresConnectes($data['id']);
      foreach($result2 as $data2){
       echo $data2['login'];
      }

 public function AfficherMembres(){
  global $pdo;
  $sql=$pdo->prepare("SELECT login , id FROM utilisateur");
  $sql->execute();
  while ($id = $sql->fetch())
   $result[] = $id;
  return $result;
 }

 public function AfficherMembresConnectes($id){
  global $pdo;
  $sql=$pdo->prepare("SELECT login FROM connectes where id_utilisateur=?");
  $sql->execute(array($id));
  while ($id = $sql->fetch())
   $result2[] = $id;
  return $result2;
 }