php --ini

按下面的步骤，在ubuntu 16.04上面安装成功了 php5.6

dpkg -l | grep php| awk '{print $2}' |tr "\n" " "

apt-get install aptitude

aptitude purge `dpkg -l | grep php| awk '{print $2}' |tr "\n" " "`

add-apt-repository ppa:ondrej/php

apt-get update

apt-get install php5.6

php -v

vim /etc/nginx/sites-enabled/default

which php

ls /run/php/

ls /run/php/ -al

fg

apt-get install php

php -v

history

apt-get install php5.6-fpm

netstat -tnelp

netstat -atunp

ps aux|grep php

netstat -atunp

netstat -atunp|grep 9000

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 16.04默认安装php7.0环境，但是php7目前兼容性并不是很好，如果自行安装php5需要清除php7的已安装包，否则会报错。

移除默认及已安装的PHP包

sudo dpkg -l | grep php| awk '{print $2}' |tr "\n" " "

sudo apt-get install aptitude

sudo aptitude purge `dpkg -l | grep php| awk '{print $2}' |tr "\n" " "`

添加 PPA

sudo add-apt-repository ppa:ondrej/php

安装php5.6

sudo apt-get update

sudo apt-get install php5.6

安装扩展

sudo apt-get install php5.6-gd

sudo apt-get install php5.6-mysql