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1. sudo aptitude purge `dpkg -l | grep php| awk '{print $2}' |tr "\n" " "` 查询卸载已安装PHP 2. sudo add-apt-repository ppa:ondrej/php 3. sudo apt-get update sudo apt-get install php5.6
得之坦然，失之淡然，顺其自然，争其必然。
1. sudo aptitude purge `dpkg -l | grep php| awk '{print $2}' |tr "\n" " "` 查询卸载已安装PHP 2. sudo add-apt-repository ppa:ondrej/php 3. sudo apt-get update sudo apt-get install php5.6