I am working with sf 4.1 and the way to install is manually also in [other issue](https://github.com/ambta/DoctrineEncryptBundle/issues/38) is mentioned that in php 7.2 there is no php_mcrypt
I am working with sf 4.1 and the way to install is manually also in other issue is mentioned that in php 7.2 there is no php_mcrypt