use root user or sudo
wget http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
rpm -ivh epel-release-7-5.noarch.rpm
yum install --enablerepo="epel" php-mcrypt

Are you trying to install the REPL repository on your droplet? If so, try running the following commands:

wget http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/epel-release-7-1.noarch.rpm
rpm -ivh epel-release-7-1.noarch.rpm
yum install --enablerepo="epel" php-mcrypt

Does that work?

wget http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/epel-release-7-1.noarch.rpm

sudo yum install epel-release-7-1.noarch.rpm

yum install php-mcrypt*

restart Apache

sudo service httpd restart

Find and edit php.ini. On ubuntu its in /etc/php5/apache2/php.ini

Add this in php.ini

extension=mcrypt.so

Restart apache

wget http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-2.noarch.rpm
rpm -ivh epel-release-7-2.noarch.rpm
yum install --enablerepo="epel" php-mcrypt

I managed to get it installed and working using the following commands...

sudo yum install epel-release
sudo yum install libmcrypt-devel

If you are running the default PHP installation you will want to run the following command as well...

sudo yum install php-mcrypt

digging an old thread, below are my results:

Error: Package: php-mcrypt-5.3.3-3.el6.x8664 (epel)
Requires: php(api) = 20090626
Installed: php-common-5.4.16-23.el70.3.x8664 (@updates)
php(api) = 20100412-64
Available: php-common-5.4.16-21.el7.x8664 (base)
php(api) = 20100412-64
Available: php-common-5.4.16-23.el70.x8664 (updates)
php(api) = 20100412-64
Available: php-common-5.4.16-23.el70.1.x8664 (updates)
php(api) = 20100412-64
Error: Package: php-mcrypt-5.3.3-3.el6.x8664 (epel)
Requires: php(zend-abi) = 20090626
Installed: php-common-5.4.16-23.el70.3.x8664 (@updates)
php(zend-abi) = 20100525-64
Available: php-common-5.4.16-21.el7.x8664 (base)
php(zend-abi) = 20100525-64
Available: php-common-5.4.16-23.el70.x8664 (updates)
php(zend-abi) = 20100525-64
Available: php-common-5.4.16-23.el70.1.x8664 (updates)
php(zend-abi) = 20100525-64
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest**

am thinking of writing off my whole project because of that, any help will be appreciated

Hi Jadoux
was wondering if you could fix your problem. I'm having the same error message ?
Thx

This might help, It works on me on my centos 7 x64
To install mcrypt just enter this command:
sudo yum install php-mcrypt.x86_64

To search for packages just do this command:
yum search php-

If you find the package that you've been looking for, and want to install it just do this command:
sudo yum install <package name>

I am getting error .

[root@uploadr mcrypt]# wget http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/e                                                                                    pel-release-7-1.noarch.rpm
--2016-10-10 20:06:05--  http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/epel                                                                                        -release-7-1.noarch.rpm
Resolving dl.fedoraproject.org (dl.fedoraproject.org)... 209.132.181.26, 209.132                                                                                        .181.23, 209.132.181.24, ...
Connecting to dl.fedoraproject.org (dl.fedoraproject.org)|209.132.181.26|:80...                                                                                         connected.
HTTP request sent, awaiting response... 404 Not Found
2016-10-10 20:06:06 ERROR 404: Not Found.

[root@uploadr mcrypt]#