Requête d'insertion sans formulaire

mysql_select_db($database_connexion, $connexion);
$query_rsArticlesP = "SELECT * FROM promoSpeciale WHERE reference = reference";
$rsArticlesP = mysql_query($query_rsArticlesP, $connexion) or die(mysql_error());
$row_rsArticlesP = mysql_fetch_assoc($rsArticlesP);
$totalRows_rsArticlesP = mysql_num_rows($rsArticlesP);

	if ((empty($_COOKIE['fiche']) AND ($totalRows_rsArticlesP<=1)))
	{
	$insertSQL = sprintf("INSERT INTO promoSpeciale (reference, date) VALUES (%s, %s)",
                       GetSQLValueString($_COOKIE['fiche'], "text"),
					   'NOW()');
	}

try {
    $pdo_options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_EXCEPTION;
    $bdd = new PDO('mysql:host=localhost;dbname='.$database_connexion, 'root', '', $pdo_options);
}
catch(Exception $e) {
    die('Error : ' . $e->getMessage());
}

$req = $bdd->prepare('
    SELECT * 
    FROM promoSpeciale 
    WHERE reference = reference');

$req->execute();
$totalRows_rsArticlesP = $req->rowCount();

if(isset($_COOKIE['fiche']) AND empty($_COOKIE['fiche']) AND $totalRows_rsArticlesP <= 1) {
    $insertSQL = $bdd->prepare('INSERT INTO promoSpeciale (reference, date) VALUES (:ref, NOW())');
    $insertSQL->bindParam(':ref', $_COOKIE['fiche'], PDO::PARAM_STR);
    $insertSQL->execute();
}