Description:
------------
The array type for oci_fetch_array() should always default to OCI_BOTH
unless explicitly changed.  For example, currently
  oci_fetch_array($s)
is equivalent to
  oci_fetch_array($s, OCI_BOTH)

I'm saying that
  oci_fetch_array($s, OCI_RETURN_NULLS)
should be equivalent to
  oci_fetch_array($s, OCI_RETURN_NULLS+OCI_BOTH)
At the moment it is equivalent to
  oci_fetch_array($s, OCI_RETURN_NULLS+OCI_NUM)
which is (i) not documented (ii) harder to understand and document.


Reproduce code:
---------------
<?php
$c = oci_connect("hr", "hr", "//localhost/XE");
$s = oci_parse($c, "select * from dual");
oci_execute($s);
while ($res = oci_fetch_array($s, OCI_RETURN_NULLS)) {
  echo "<pre>"; var_dump($res); echo "</pre>";
}
oci_execute($s);
while ($res = oci_fetch_array($s)) {
  echo "<pre>"; var_dump($res); echo "</pre>";
}
  oci_close($c);
?>

Expected result:
----------------
  array(2) {
    [0]=>
    string(1) "X"
    ["DUMMY"]=>
    string(1) "X"
  }

  array(2) {
    [0]=>
    string(1) "X"
    ["DUMMY"]=>
    string(1) "X"
  }

Actual result:
--------------
  array(1) {
    [0]=>
    string(1) "X"
  }

  array(2) {
    [0]=>
    string(1) "X"
    ["DUMMY"]=>
    string(1) "X"
  }