Php/docs/function.cubrid-is-instance
cubrid_is_instance
(PECL CUBRID >= 8.3.0)
cubrid_is_instance — Check whether the instance pointed by OID exists
说明
cubrid_is_instance
( resource $conn_identifier
, string $oid
) : int
The cubrid_is_instance() function is used to check
whether the instance pointed by the given oid
exists or not.
参数
conn_identifier- Connection identifier.
oid- OID of the instance that you want to check the existence.
返回值
1, if such instance exists;
0, if such instance does not exist;
-1, in case of error
范例
Example #1 cubrid_is_instance() example
<?php$conn = cubrid_connect("localhost", 33000, "demodb");$sql = <<<EODSELECT host_year, medal, game_date FROM game WHERE athlete_code IN (SELECT code FROM athlete WHERE name='Thorpe Ian');EOD;$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);?>
以上例程会输出：
Instance pointed by @0|0|0 doesn't exist.
参见
- cubrid_drop() - Delete an instance using OID
- cubrid_get_class_name() - Get the class name using OID
