无法在linux上连接php和ms access数据库

我已经在

ubuntu14.0

中安装了

unixodbc

和

libodbc

，并在这里配置了它

/etc/odc.ini 
[MyDriver]
Description = MyDriver Driver for MyDBMS
Driver      = /path/to/libmyodbc.so
Setup       = /path/to/libmyodbcs.so
FileUsage   = 1
UsageCount  = 1

[MyDataSource]
Description = The Source of My Data
Driver      = MyDriver
ServerName  = localhost
Database    = MyDatabase
UserName    = admin
Password    = something

和数据源配置

/etc/odc.ini 
[MyDriver]
Description = MyDriver Driver for MyDBMS
Driver      = /path/to/libmyodbc.so
Setup       = /path/to/libmyodbcs.so
FileUsage   = 1
UsageCount  = 1

[MyDataSource]
Description = The Source of My Data
Driver      = MyDriver
ServerName  = localhost
Database    = MyDatabase
UserName    = admin
Password    = something

下面是php代码

$query = 'SELECT * FROM MyTable';
$mdb_file = '/path/to/example.mdb';
$uname = explode(" ",php_uname());
$os = $uname[0];
switch ($os){
  case 'Windows':
    $driver = '{Microsoft Access Driver (*.mdb)}';
    break;
  case 'Linux':
    $driver = 'MDBTools';
    break;
  default:
    exit("Don't know about this OS");
}
$dataSourceName = "odbc:Driver=$driver;DBQ=$mdb_file;";
$connection = new \PDO($dataSourceName,'','');
$result = $connection->query($query)->fetchAll(\PDO::FETCH_ASSOC);
print_r($result);

但如果我输入sql的用户名，它将通过拒绝用户root的访问进行访问 它与sql连接

更改

$dataSourceName = "odbc:Driver=$driver;DBQ=$mdb_file;";

到

---

虽然我的dsn引用的是ms access文件，但它只是与mysql数据库连接，而不是与ms access连接