PHP bindings for the dmtx library Formula was removed
Last versions were

Revision: 5

php56-dmtx requires the following formulae to be installed:
autoconf 2.69 Automatic configure script builder
libdmtx 0.7.4 Data Matrix library
pkg-config 0.29.2 Manage compile and link flags for libraries

Recent formula history

ilovezfs php56: migrate to homebrew/core (#4835)
Jan Viljanen php5: icu4c rev bump
Andreas Braun Bump revisions for imagemagick dependent formulae
Jan Viljanen php5{3-6}-dmtx: refresh bottle
Jan Viljanen php5{3-6}-dmtx revision bump

Formula code at GitHub