odbc_close()

(PHP 4, PHP 5, PHP 7)

Close an ODBC connection

说明

odbc_close(resource $connection_id): void

Closes down the connection to the database server.

参数

$connection_id

ODBC 连接标识符，详见odbc_connect()。

返回值

没有返回值。

注释

Note:

This function will fail if there are open transactions on this connection. The connection will remain open in this case.

`odbc_close()` does not report success and some drivers (namely Microsoft Access) don't seem to close connections at first attempt. This is normally not an issue, unless you need to establish many connections within the script lifetime.
You can use the fact that resource type changes (e.g. from "odbc link" to "Unknown") as a trick to figure out whether connection was successfully closed (and eventually retry):
<?php
$type = get_resource_type($conn);
$wait_until = time() + 3;
do {
  odbc_close($conexion_odbc);
} while (get_resource_type($conn)===$type && time()<$wait_until);

On microsoft servers, use the odbc_free_result command.