Resolving Dependencies

--> Running transaction check

---> Package php-mcrypt.x86_64 0:5.3.3-4.el6 will be installed

--> Processing Dependency: php(zend-abi) = 20090626 for package: php-mcrypt-5.3.3-4.el6.x86_64

--> Processing Dependency: php(api) = 20090626 for package: php-mcrypt-5.3.3-4.el6.x86_64

--> Processing Dependency: libmcrypt.so.4()(64bit) for package: php-mcrypt-5.3.3-4.el6.x86_64

--> Running transaction check

---> Package libmcrypt.x86_64 0:2.5.8-9.el6 will be installed

---> Package php-mcrypt.x86_64 0:5.3.3-4.el6 will be installed

--> Processing Dependency: php(zend-abi) = 20090626 for package: php-mcrypt-5.3.3-4.el6.x86_64

--> Processing Dependency: php(api) = 20090626 for package: php-mcrypt-5.3.3-4.el6.x86_64

--> Finished Dependency Resolution

Error: Package: php-mcrypt-5.3.3-4.el6.x86_64 (epel)

           Requires: php(zend-abi) = 20090626

           Installed: php-common-5.4.16-36.el7_1.x86_64 (@base)

               php(zend-abi) = 20100525-64

Error: Package: php-mcrypt-5.3.3-4.el6.x86_64 (epel)

           Requires: php(api) = 20090626

           Installed: php-common-5.4.16-36.el7_1.x86_64 (@base)

               php(api) = 20100412-64

 You could try using --skip-broken to work around the problem

 You could try running: rpm -Va --nofiles --nodigest

En este caso, prueba ejecutar las siguientes órdenes

yum clean all

yum remove epel-release

yum install epel-release 

yum install php-mcrypt