The php-mcrypt extension is not available on CentOS 6 or RHEL 6 (with/without Parallels Plesk 11) although some applications such as Magento or phpMyAdmin require it to work properly.
We can easily install it though from the Fedora Project repositories or any other repository that include php-mcrypt.
1. Download the following RPM pacakges by using wget command:
2. Install them using YUM:
yum localinstall php-mcrypt-5.3.3-1.el6.x86_64.rpm libmcrypt-2.5.8-9.el6.x86_64.rpm
3. Reload Apache server to load the extension up:
service httpd restart