我已经将这些行添加到/etc/apt/sources.list
deb http://packages.dotdeb.org wheezy-php56 all deb-src http://packages.dotdeb.org wheezy-php56 all
但仍sudo apt-get update或sudo apt-get upgrade不要碰php。
php --version仍然是
PHP 5.4.39-0+deb7u2 (cli) (built: Mar 25 2015 08:33:29)
（ 更新 ）试试这个（Ubuntu）：
sudo add-apt-repository ppa:ondrej/php -y sudo apt-get update sudo apt-get install php5.6-fpm -y
（更新）对于Debian Wheezy（与sudo）
echo "deb http://packages.dotdeb.org wheezy-php56 all" >> /etc/apt/sources.list.d/dotdeb.list echo "deb-src http://packages.dotdeb.org wheezy-php56 all" >> /etc/apt/sources.list.d/dotdeb.list wget http://www.dotdeb.org/dotdeb.gpg -O- | apt-key add - apt-get update apt-get install php5-cli php5-fpm ….. (or whatever package you might need)
（更新21/06/2017）对于Debian 8（jessie）
sudo nano /etc/apt/sources.list
添加以下存储库：
... deb http://mirrors.digitalocean.com/debian jessie main contrib non-free deb-src http://mirrors.digitalocean.com/debian jessie main contrib non-free deb http://security.debian.org/ jessie/updates main contrib non-free deb-src http://security.debian.org/ jessie/updates main contrib non-free # jessie-updates, previously known as 'volatile' deb http://mirrors.digitalocean.com/debian jessie-updates main contrib non-free deb-src http://mirrors.digitalocean.com/debian jessie-updates main contrib non-free
然后更新您的来源：
sudo apt-get update
然后安装php5-fpm
sudo apt-get install php5-fpm
sudo nano /etc/apt/sources.list
加
deb http://packages.dotdeb.org wheezy all deb-src http://packages.dotdeb.org wheezy all deb http://packages.dotdeb.org wheezy-php56-zts all deb-src http://packages.dotdeb.org wheezy-php56-zts all
保存并运行
sudo apt-get update sudo apt-get upgrade sudo apt-get install php5
完成apt-get update和apt-get upgrade您需要执行以下操作：
sudo apt-get install php5