ubuntu安装PHP5
sudo apt-get install -y language-pack-en-base
sudo LC_ALL=en_US.UTF-8 add-apt-repository ppa:ondrej/PHP
sudo add-apt-repository ppa:ondrej/PHP
sudo apt-get update apt-cache search PHP5
sudo apt-get install PHP5.5-common
sudo apt-get install libapache2-mod-PHP5.5
