(PECL CUBRID >= 8.3.0)
cubrid_free_result — Free the memory occupied by the result data
$req_identifier): bool
    This function frees the memory occupied by the result data. It returns
    true on success or false on failure. Note that it can only frees the
    client fetch buffer now, and if you want free all memory, use function
    cubrid_close_request().
  
req_identifierThis is the request identifier.
   Returns true on success or false on failure.
  
Example #1 cubrid_free_result() example
<?php 
$conn = cubrid_connect("localhost", 33000, "demodb");
$req = cubrid_execute($conn, "SELECT * FROM history WHERE host_year=2004 ORDER BY event_code");
$row = cubrid_fetch_assoc($req);
var_dump($row);
cubrid_free_result($req);
cubrid_close_request($req);
cubrid_disconnect($conn);
?>
The above example will output:
array(5) {
  ["event_code"]=>
  string(5) "20005"
  ["athlete"]=>
  string(12) "Hayes Joanna"
  ["host_year"]=>
  string(4) "2004"
  ["score"]=>
  string(5) "12.37"
  ["unit"]=>
  string(4) "time"
}