Installing/Configuring
PHP Manual

Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

Mcrypt configuration options
Name Default Changeable Changelog
mcrypt.algorithms_dir NULL PHP_INI_ALL Available since PHP 4.0.2.
mcrypt.modes_dir NULL PHP_INI_ALL Available since PHP 4.0.2.
For further details and definitions of the PHP_INI_* modes, see the Where a configuration setting may be set.


Installing/Configuring
PHP Manual