how to get returned value from stored function in PDO?

I have this code :

include("connect.php");
// Call database function
$p = 100;
$sth = $conn->prepare('SELECT ISPPRO.USERPKG.GET_USER(:bind1, :bind3) AS v FROM DUAL');
$sth->bindParam(":bind1", $p, PDO::PARAM_INT);
$sth->bindParam(":bind3", $p, PDO::PARAM_INT);
$sth->execute();
$result = $sth->fetch(PDO::FETCH_ASSOC);
print_r( $result);
echo "<br><pre>";
print_r($conn->errorInfo());
echo "</pre>";

The ISPPRO.USERPKG.GET_USER returns 1 开发者_开发百科or 0;

How I can get it??

Thanks in advance.

EDIT:

I changed the above code and I am getting this error:

OCIStmtExecute: ORA-00904: "ISPPRO"."USERPKG"."GET_USER": invalid identifier

---

If you have an Oracle function that returns a scalar you read it as any other value, e.g.:

SELECT ISPPRO.USERPKG.GET_USER(:user, :pass) AS foo
FROM DUAL

... and read the value from the column foo as in any other query.

---

Do you have execute permission on the package?

User ISPPRO should run the command

GRANT EXECUTE ON userpkg TO <your_user>;

An easy way to check if you've been granted execute on this package is to run this command:

SELECT privilege
  FROM all_tab_privs
 WHERE table_schema = 'ISPPRO'
   AND table_name = 'USERPKG';

You should get a row with EXECUTE as the privilege.