POO PHP : StdClass

class Client { 

 protected $liste_commandes; 

 public function __construct($id = false){ 
  $this->connexion->query("SELECT * FROM ..."); 
  ... 
  $this->liste_commandes = $this->ListeCommandes(); 
 } 

 private function ListeCommandes(){ 
  $listecommandes = Array(); 
  $query = "SELECT num_facture, date, total_ttc, id_fdp, total_global_ttc, prix_tva FROM commandes WHERE id_client='$this->id_client' ORDER BY date DESC"; 
  $result = $this->connexion->query($query); 
  while($ligne = $result->fetch_object()){ 
   $listecommandes[] = $ligne; 
  } 

  return $listecommandes; 
 } 

 public function getListe_commandes() { 
  return $this->liste_commandes; 
 } 
} 

$client = new Client($id); 
print_r($client->getListe_commandes()); 

Array 
( 
    [0] => stdClass Object 
        ( 
            [num_facture] => 123456 
            [date] => 2011-05-01 14:36:51 
            [total_ttc] => 149.00 
            [id_fdp] =>  
            [total_global_ttc] => 159.00 
            [prix_tva] =>  
        ) 

)