An interface to the mcrypt library Formula was removed
Last version was
php54-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

Mike McQuaid Deprecate tap.
Jan Viljanen php-mcrypt: add libtool run dependency
Andy Blyler Revert "php 5.5.34"
Andy Blyler php 5.5.34
Andreas Braun Add description for mcrypt formula

Formula code at GitHub