$SQLCMD = "{call [dbo].[Login](?,?)}";
$SQLCMD_PARAMS = array($LoginID, array(&$USER_ID ,  SQLSRV_PARAM_OUT ) );

$SQLCONN = sqlsrv_connect( $SERVER_NAME, $CONNINFO);

$RES = sqlsrv_query($SQLCONN,$SQLCMD,$SQLCMD_PARAMS);