Interface to the mcrypt library Formula was removed
Last version was

Revision: 20

php71-mcrypt requires the following formulae to be installed:
autoconf 2.69 Automatic configure script builder
mcrypt 2.6.8 Replacement for the old crypt package and crypt(1) command
libtool 2.4.6_1 Generic library support script

Recent formula history

Kevin Abel php71: migrate to homebrew/core (#4798)
Sean Molenaar php71 7.1.14
Sean Molenaar php71: 7.1.13
Andreas Braun php71 7.1.12
Andreas Braun php71 7.1.11

Formula code at GitHub