&reftitle.constants;

Since PHP 4.3.0 it is possible to identify at runtime which `iconv` implementation is adopted by this extension.

# iconv 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.

Since PHP 5.0.0, the following constants are also available:

## `iconv` constants available since PHP 5.0.0

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