macコンピュータはphp 7をインストールします

 
1.homebrewのインストール
https://www.jianshu.com/p/abea83253671

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew tap homebrew/homebrew-php

 
2.Homebrew PHPをインストール(new!)
https://www.jianshu.com/p/4189c878da21

brew install php@7.1

最後に上記実装後の結果に従って実行

echo 'export PATH="/usr/local/opt/[email protected]/bin:$PATH"' >> ~/.bash_profile
  echo 'export PATH="/usr/local/opt/[email protected]/sbin:$PATH"' >> ~/.bash_profile
export LDFLAGS="-L/usr/local/opt/[email protected]/lib"
  export CPPFLAGS="-I/usr/local/opt/[email protected]/include"
source ~/.bash_profile