cubrid_is_instance

Check whether the instance pointed by OID exists

&reftitle.description; `int` `cubrid_is_instance` `resource` `conn_identifier` `string` `oid`

The `cubrid_is_instance` function is used to check whether the instance pointed by the given `oid` exists or not.

&reftitle.parameters;

`conn_identifier`

- Connection identifier.

`oid`

- OID of the instance that you want to check the existence.

&reftitle.returnvalues;

1, if such instance exists;

0, if such instance does not exist;

-1, in case of error

&reftitle.examples;

### `cubrid_is_instance` example

    <?php
    $conn = cubrid_connect("localhost", 33000, "demodb");

    $sql = <<<EOD
    SELECT host_year, medal, game_date
    FROM game
    WHERE athlete_code IN
        (SELECT code FROM athlete WHERE name='Thorpe Ian');
    EOD;

    $req = cubrid_execute($conn, $sql, CUBRID_INCLUDE_OID);
    $oid = cubrid_current_oid($req);

    $res = cubrid_is_instance ($conn, $oid);
    if ($res == 1) {
        echo "Instance pointed by $oid exists.\n";
    } else if ($res == 0){
        echo "Instance pointed by $oid doesn't exist.\n";
    } else {
        echo "error\n";
    }

    cubrid_disconnect($conn);
    ?>

&example.outputs;

    Instance pointed by @0|0|0 doesn't exist.

&reftitle.seealso;

- `cubrid_drop`
- `cubrid_get_class_name`