How to install all required PHP extensions for Laravel?

I need to make my Ubuntu 16.04. Is there a way using the GUI or is the simplest way to do this by using terminal?

I have already installed PHP 7.1, MariaDB.

I need to enable:

1. OpenSSL PHP Extension
2. PDO PHP Extension
3. Mbstring PHP Extension
4. Tokenizer PHP Extension
5. XML PHP Extension