HomeBrew 安装 PHP7.1
brew update
brew tap homebrew/dupes
brew tap homebrew/php
brew update
brew install php71
一、安装常见问题：
1、找不到libphp7.so
解决方法：
$ brew info php71 //查看信息
brew install php71 --with-httpd24 //安装带模块
装好后 apache 没找到 libphp7.so
sudo vim /etc/apache2/httpd.conf
LoadModule php7_module /usr/local/Cellar/php71/7.1.11_22/libexec/apache2/libphp7.so