Description:
------------
---
From manual page: http://www.php.net/function.sqlsrv-field-metadata#refsect1-function.sqlsrv-field-metadata-returnvalues
---

constants SQLSRV_NULLABLE_YES, SQLSRV_NULLABLE_NO are actually reversed!

in my database, I set a field that is 'NOT NULL',
sqlsrv_field_metadata() reports it is SQLSRV_NULLABLE_YES and vice versa for the SQLSRV_NULLABLE_NO.

Test script:
---------------
// open database and make connection, etc.
// select * from mytable
// etc.


foreach( sqlsrv_field_metadata($stmt) as $fieldMetadata ) {
  print($fieldMetadata['Name'] . " is ");
  if ( $fieldMetadata['Nullable'] === SQLSRV_NULLABLE_YES )
    print("NULLABLE_YES\n");
  else if ( $fieldMetadata['Nullable'] === SQLSRV_NULLABLE_NO )
    print("NULLABLE_NO\n");
  else
    print("NULLABLE_UNKNOWN\n");
}


Expected result:
----------------
field1 is NULLABLE_YES
field2 is NULLABLE_NO
field3 is NULLABLE_NO


Actual result:
--------------
field1 is NULLABLE_NO
field2 is NULLABLE_YES
field3 is NULLABLE_YES