我在Ubuntu 14上安装cakephp时遇到问题。* pl检查附图

I am facing issue at time of installation of cakephp on Ubuntu 14.* pl check attached image

The error message pretty much tells you what the problem is and what to do.

On your system the the mbstring PHP extension is not installed or is not enabled.

You need to find out how to install the PHP mbstring extension on your Ubuntu box or how to enable it if it is already installed.