&reftitle.constants;

It is possible to identify at runtime which `iconv` implementation is adopted by this extension.

# iconv implementation constants

Name | Type | Description
`ICONV_IMPL` | `string` | The implementation name
`ICONV_VERSION` | `string` | The implementation version

Writing implementation-dependent scripts with these constants is strongly discouraged.

The following constants are also available:

## Other `iconv` constants

Name | Type | Description
`ICONV_MIME_DECODE_STRICT` | `int` | A bitmask used for `iconv_mime_decode`
`ICONV_MIME_DECODE_CONTINUE_ON_ERROR` | `int` | A bitmask used for `iconv_mime_decode`