这里作者挂了梯子，所以很流畅！
brew的下载，可参考另外一篇博文～Homebrew 安装与卸载
1、将第三方仓库加入brew
clike
brew tap shivammathur/php
2、安装指定版本的PHP
clike
brew install [email protected]
3、替换Mac自带PHP环境并刷新环境变量
clike
-> % vim ~/.zshrc将以下内容加入环境变量
clike
echo 'export PATH="/opt/homebrew/opt/[email protected]/bin:$PATH"' >> ~/.zshrc
echo 'export PATH="/opt/homebrew/opt/[email protected]/sbin:$PATH"' >> ~/.zshrc
export LDFLAGS="-L/opt/homebrew/opt/[email protected]/lib"
export CPPFLAGS="-I/opt/homebrew/opt/[email protected]/include"刷新环境变量
clike
source ~/.zshrc 最后，查看php版本
clike
php -v