相关疑难解决方法(0)

我有“Ubuntu 14.04.2 LTS”操作系统并尝试使用以下命令安装 PHP7：

sudo apt-get install php-7.0

获取错误信息：

Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package php-7.0
E: Couldn't find any package by regex 'php-7.0'

sudo apt-get install php7.0
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package php7.0
E: Couldn't find any package by regex 'php7.0'

如何修复 请指教。

我将我的 Ubuntu 14.04 升级到 16.04。但是我的 phpmyadmin 有错误

The mbstring extension is missing. Please check your PHP configuration.

我在某个地方搜索过，但在 Ubuntu 上没有解决方案。请帮我。我正在使用 apache2