High Performance Remote Object Service Engine Formula was removed
Last versions were
php56-hprose requires the following formulae to be installed:
autoconf 2.69 Automatic configure script builder

Recent formula history

ilovezfs php56: migrate to homebrew/core (#4835)
Laoliu php-hprose 1.6.6
Jan Viljanen hprose php70/56 bottle update
andot hprose update to 1.6.5
andot Update hprose from 1.5.4 to 1.6.4

Formula code at GitHub