(PECL ingres >= 2.1.0)
ingres_charset — Returns the installation character set
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.
The connection link identifier
Returns a string with the value for II_CHARSETxx or returns NULL if the value could not be determined.
Example #1 ingres_charset() - Get the installation character set
<?php
$link = ingres_connect($database, $user, $password);
echo ingres_charset($link) . "\n";
ingres_close($link);
?>