# db2_close

(PECL ibm_db2 >= 1.0.0)

db2_close — Closes a database connection

### 说明

db2_close(resource `$connection`): bool

This function closes a DB2 client connection created with db2_connect() and returns the corresponding resources to the database server.

If you attempt to close a persistent DB2 client connection created with db2_pconnect(), the close request is ignored and the persistent DB2 client connection remains available for the next caller.

### 参数

`connection`
  Specifies an active DB2 client connection.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。

### 示例

示例 #1 Closing a connection

The following example demonstrates a successful attempt to close a connection to an IBM DB2, Cloudscape, or Apache Derby database.

`<?php
$conn = db2_connect('SAMPLE', 'db2inst1', 'ibmdb2');
$rc = db2_close($conn);
if ($rc) {
echo "Connection was successfully closed.";
}
?>`

以上示例会输出：

    Connection was successfully closed.

### 参见

- db2_connect() - Returns a connection to a database
- db2_pclose() - Closes a persistent database connection
- db2_pconnect() - Returns a persistent connection to a database

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