### brew install
$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
### check
$ brew -v
$ brew install composer
$ composer -v
$ brew search php
$ brew info php
$ brew install php
$ brew services start php
# terminal restart
$ brew install mysql
$ brew services start mysql
# パスを通す
$ echo 'export PATH="/usr/local/opt/mysql/bin:$PATH"' >> ~/.bashrc
# 設定反映
$ source ~/.bashrc