如何从php5升级到php7，ubuntu 14 ,nginx+php7
- #安装ppa
- sudo apt-get install python-software-properties software-properties-common
- sudo add-apt-repository ppa:ondrej/php-7.0
- sudo apt-get update
- #删除php5
- sudo apt-get purge php5-fpm php5-mysql php5-common
- sudo apt-get --purge autoremove
- #安装php7
- sudo apt-get install php7.0-fpm php7.0-mysql php7.0-common php7.0-curl
- #把nginx *.conf 里的fastcgi_pass配置改成：
- fastcgi_pass unix:/run/php/php7.0-fpm.sock;
- #重启nginx
- sudo service nginx reload
- #完成.