laravel composer update : the requested PHP extension dom is missing from your system

Question

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 checke

Answer 1

Managed to fix it with a php version 5.6* :

$ sudo apt-get update
$ sudo apt-get install php5.6-xml