如何从php5升级到php7

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.