File differences and patches Formula was removed
Last versions were
php70-xdiff requires the following formulae to be installed:
autoconf 2.69 Automatic configure script builder
libxdiff 0.23 Implements diff functions for binary and text files

Recent formula history

ilovezfs php70: migrate to homebrew/core
Jannes Jeising Add php54-xdiff, php55-xdiff, php56-xdiff, php70-xdiff and php71-xdiff

Formula code at GitHub