软件包php5没有安装候选版本（Ubuntu 16.04）
当我尝试使用以下代码在Ubuntu 16.04中安装php5时： sudo apt-get install php5 php5-mcrypt 我收到以下错误： Reading package lists... Done Building dependency tree Reading state information... Done Package php5 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: …