Wrapper for the ICU library Formula was removed
Last version was

Revision: 25

php71-intl requires the following formulae to be installed:
autoconf 2.69 Automatic configure script builder
icu4c 61.1 C/C++ and Java libraries for Unicode and globalization

Recent formula history

Kevin Abel php71: migrate to homebrew/core (#4798)
Sean Molenaar php71 7.1.14
Mike McQuaid php71-intl: use <<~EOS.
Sean Molenaar php71: 7.1.13
Andreas Braun php{56-72}-intl: revision bump

Formula code at GitHub