Настройка во время выполнения

Поведение этих функций зависит от установок в php.ini.

Mcrypt configuration options

Name	Default	Changeable	Changelog
mcrypt.algorithms_dir	NULL	PHP_INI_ALL
mcrypt.modes_dir	NULL	PHP_INI_ALL

Для подробного описания констант PHP_INI_*, обратитесь к разделу Where a configuration setting may be set.

Краткое разъяснение конфигурационных директив.

mcrypt.algorithms_dir string

The directory that contains the algorithms. Defaults to the directories compiled within libmcrypt, which is typically /usr/local/lib/libmcrypt. See mcrypt_list_algorithms() for additional details.

mcrypt.modes_dir string

The directory that contains the modes. Defaults to the directories compiled within libmcrypt, which is typically /usr/local/lib/libmcrypt. See mcrypt_list_modes() for additional details.