laravel composer更新:您的系统中缺少所请求的PHP扩展名dom
问题描述：
我正在使用ubuntu 16.04，laravel 5.2 当我在项目目录中运行update composer时，显示 您的系统缺少所需的PHP扩展名dom" 我检查了已安装的PHP软件包，在那里可用
I am using ubuntu 16.04, laravel 5.2 when i run update composer in my project directory its showing "the requested PHP extension dom is missing from your system" i checked installed packages of PHP, its available there
答
安装xml-extension(在我的情况下为php7.0-xml)解决了问题
Installing xml-extension (php7.0-xml in my case) solved the problem
sudo apt-get install php-xml