Mcrypt extension is missing in 14.04 server for mysql

Try just doing this:

sudo php5enmod mcrypt

And then:

sudo service apache2 restart 

I have installed fresh Ubuntu 14.04 (desktop version) to my computer. This way works for enabling mcrypt that was already installed.

Try this:

sudo updatedb 
locate mcrypt.ini

Should show it located at /etc/php5/mods-available

locate mcrypt.so

Edit mcrypt.ini and change extension to match the path to mcrypt.so, example:

extension=/usr/lib/php5/20121212/mcrypt.so

Now this:

sudo php5enmod mcrypt - (optional since its already enabled during phpmyadmin setup)

Verify that new files exists here (they should be auto created from the issue above)

ls -al /etc/php5/cli/conf.d/20-mcrypt.ini
ls -al /etc/php5/apache2/conf.d/20-mcrypt.ini

Otherwise do the following

Create symbol links now

sudo ln -s /etc/php5/mods-available/mcrypt.ini /etc/php5/cli/conf.d/20-mcrypt.ini
sudo ln -s /etc/php5/mods-available/mcrypt.ini /etc/php5/apache2/conf.d/20-mcrypt.ini

Restart Apache

sudo service apache2 restart

Restart php5 or php5-fpm

sudo service php5 restart

Install mcrypt extension for PHP, Enable it, and Restart Apache. Following are the commands to do:

sudo apt-get install mcrypt php5-mcrypt
sudo php5enmod mcrypt
sudo service apache2 restart