Description:
------------
I don't know if it is a documentation problem or OCI8-related bug. I 
find that oci_fetch_all() always returns empty arrays on subsequent 
calls on the same statement handler. PHP Manual does not say anything 
about it.

Reproduce code:
---------------
<?php
include_once './dbconfig.php'; // $config is defined here

$connection = oci_connect($config['dbuser'], $config['dbpassword'], $config['db']);

$stmt       = oci_parse($connection, "SELECT 1 FROM dual WHERE 1 = :value");

$i = 1;
oci_bind_by_name($stmt, ':value', $i, -1, SQLT_INT);
oci_execute($stmt);
oci_fetch_all($stmt, $rs, 0, -1, OCI_FETCHSTATEMENT_BY_ROW);
var_dump($rs).'<br />'; // full-data array
oci_fetch_all($stmt, $rs1, 0, -1, OCI_FETCHSTATEMENT_BY_ROW);
var_dump($rs1); // empty array

oci_free_statement($stmt);
oci_close($connection);
?>

Expected result:
----------------
If it is OCI8-related bug, oci_fetch_all should return the same data 
array on multiple calls.

If it is an undocumented behavior, could you please add a 
note about it in PHP Manual ?

Actual result:
--------------
oci_fetch_all() always returns empty arrays on subsequent calls on 
the same statement handler