Set encryption mode for the document - Справочник: PHP5.4

bool HaruDoc::setEncryptionMode ( int $mode [, int $key_len = 5 ] )

Defines encryption mode for the document. The encryption mode cannot be set before setting the password.

mode

The encryption mode to use. Can be one of the following:

HaruDoc::ENCRYPT_R2 - use "revision2" algorithm.
HaruDoc::ENCRYPT_R3 - use "revision3" algorithm. Using this value bumps the version of PDF to 1.4.

key_len

The encryption key length in bytes. This parameter is optional and used only when mode is HaruDoc::ENCRYPT_R3. The default value is 5 (40bit).

Returns TRUE on success.

Вызывает исключение HaruException при ошибке.