PHP extension mcrypt is not enabled on server

Question

I'm modifying a plugin in wordpress. The plugin is "RegistrationMagic", when I inhaled it and went to the screen it appeared the following message "PHP extension mcrypt is not enabled on server".

I tried to follow the hint of that question " https://askubuntu.com/questions/460837/mcrypt-extension-is-missing-in-14-04-server-for-mysql "

But when I get to that part:

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

Can not find conf.d file

Someone can help me: I already tried to reinstall php5 but it did not work either.

EDIT

When I do a locate in myscript.so it returns this below:

$locate mcrypt.so

/usr/lib/libmcrypt.so.4
/usr/lib/libmcrypt.so.4.4.8
/usr/lib/php5/20121212/mcrypt.so

Answer 1

PHP doesn't compile mcrypt by default. you first have to have mcrypt installed

You need to compile PHP with the --with-mcrypt[=DIR] parameter to enable this extension. DIR is the mcrypt install directory. Make sure you compile libmcrypt with the option --disable-posix-threads

an example for enabling it on ubuntu, in terminal run the following:

apt-get install php5-mcrypt
mv -i /etc/php5/conf.d/mcrypt.ini /etc/php5/mods-available/
php5enmod mcrypt
service apache2 restart

here is an article on the php5enmod command: https://lornajane.net/posts/2012/managing-php-5-4-extensions-on-ubuntu

to Fix a missing mcrypt ini:

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

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

Answer 2

Check if mcrypt is enabled or not

php -i | grep mcrypt

Now if it displays you something related to myrypt and its version mean mcrypt is already enabled. just restart your apache server and you're good to go.

and i think that's your only issue, rest you know already.

In case if it's not installed

sudo apt-get install php5-mcrypt
OR
using PECL
sudo pecl install mcrypt