无法使用PHP连接到MS Access DB：SQLSTATE [IM002]

Question

I am trying to get data from a MS Access DB (.mdb) but I'm getting:

échec de connexion: SQLSTATE[IM002] SQLDriverConnect: 0 [Microsoft][Gestionnaire de pilotes ODBC] Source de données introuvable et nom de pilote non spécifié.

English:

connection failure: SQLSTATE [IM002] SQLDriverConnect: 0 [Microsoft] [ODBC driver manager] data source not found and driver name unspecified.

I have : Office 365 Business 32-bit installed. Already installed the latest Access Database Engine 32-bit. Uncommented " extension=pdo_odbc " in php.ini. Added the "Microsoft Access Driver" to the list of drivers.

$dbName = 'C:\wamp64\www\Test\Workgroup.mdb';
if (!file_exists($dbName))
{
    die("Could not find database file.");
}
else
{
    try{
        //$dbName = 'Workgroup.mdb';
        $cnx = new PDO("odbc:DRIVER={Microsoft Access Driver (*.mdb)}; Dbq=$dbName; Uid=; Pwd=;");
        echo "connected successfully";
        return $cnx;
    }
    catch(Exception $e){
        die ("failed to connect: " . $e->getMessage());
    }
}