How to install the php-mcrypt module on Plesk

For for CentOS , Scientific Linux , and Oracle Linux

The php-mcrypt package is available from RPMforge and EPEL repositories. Add the repository to the server and install the package using the yum utility:

yum install epel-release

Then, install the php-mcrypt module:

yum install php-mcrypt

For Debian based OS:

apt-get install php5-mcrypt

Afterwards, if mcrypt module has been not appeared on Tools & Settings > PHP Settings > [name of PHP handler] > Extensions page, it might be necessary to refresh server components by opening Tools & Settings > Server Components and pressing Refresh.

To make mcrypt module be available for existing websites update their PHP settings by running:

/usr/local/psa/bin/php_settings -u