# db2_autocommit

(PECL ibm_db2 >= 1.0.0)

db2_autocommit — Returns or sets the AUTOCOMMIT state for a database connection

### 说明

db2_autocommit(resource `$connection`, int `$value` = ?): int|bool

Sets or gets the AUTOCOMMIT behavior of the specified connection resource.

### 参数

`connection`
  A valid database connection resource variable as returned from db2_connect() or db2_pconnect().
`value`

  One of the following constants:

  `DB2_AUTOCOMMIT_OFF`
    Turns AUTOCOMMIT off.
  `DB2_AUTOCOMMIT_ON`
    Turns AUTOCOMMIT on.

### 返回值

When db2_autocommit() receives only the `connection` parameter, it returns the current state of AUTOCOMMIT for the requested connection as an integer value. A value of `DB2_AUTOCOMMIT_OFF` indicates that AUTOCOMMIT is off, while a value of `DB2_AUTOCOMMIT_ON` indicates that AUTOCOMMIT is on.

When db2_autocommit() receives both the `connection` parameter and `autocommit` parameter, it attempts to set the AUTOCOMMIT state of the requested connection to the corresponding state. 成功时返回 `true`， 或者在失败时返回 `false`。

### 示例

示例 #1 Retrieving the AUTOCOMMIT value for a connection

In the following example, a connection which has been created with AUTOCOMMIT turned off is tested with the db2_autocommit() function.

`<?php
$options = array('autocommit' => DB2_AUTOCOMMIT_OFF);
$conn = db2_connect($database, $user, $password, $options);
$ac = db2_autocommit($conn);
if ($ac == DB2_AUTOCOMMIT_OFF) {
print "$ac -- AUTOCOMMIT is off.";
} else {
print "$ac -- AUTOCOMMIT is on.";
}
?>`

以上示例会输出：

    0 -- AUTOCOMMIT is off.

示例 #2 Setting the AUTOCOMMIT value for a connection

In the following example, a connection which was initially created with AUTOCOMMIT turned off has its behavior changed to turn AUTOCOMMIT on.

`<?php
$options = array('autocommit' => DB2_AUTOCOMMIT_OFF);
$conn = db2_connect($database, $user, $password, $options);
// Turn AUTOCOMMIT on
$rc = db2_autocommit($conn, DB2_AUTOCOMMIT_ON);
if ($rc) {
print "Turning AUTOCOMMIT on succeeded.\n";
}
// Check AUTOCOMMIT state
$ac = db2_autocommit($conn);
if ($ac == DB2_AUTOCOMMIT_OFF) {
print "$ac -- AUTOCOMMIT is off.";
} else {
print "$ac -- AUTOCOMMIT is on.";
}
?>`

以上示例会输出：

    Turning AUTOCOMMIT on succeeded.
    1 -- AUTOCOMMIT is on.

### 参见

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

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