# ingres_charset

(PECL ingres >= 2.1.0)

ingres_charset — Returns the installation character set

### 说明

ingres_charset ( resource `$link` ) : string

ingres_charset() is called to determine the character set being used by the Ingres client, from II_CHARSETxx (where xx is the installation code).

> Note:

> You can override the value returned by using the function putenv(). Changing the value of II_CHARSETxx in a running Ingres installation can cause data corruption.

### 参数

`link`

  The connection link identifier

### 返回值

Returns a string with the value for II_CHARSETxx or returns NULL if the value could not be determined.

### 范例

Example #1 ingres_charset() - Get the installation character set

    <?php
    $link = ingres_connect($database, $user, $password);

    echo ingres_charset($link) . "\n";

    ingres_close($link);
    ?>

### 参见

- ingres_connect() - Open a connection to an Ingres database
- ingres_query() - Send an SQL query to Ingres