I followed this tutorial for upgrading my droplet with a LEMP stack to PHP7:

https://www.digitalocean.com/community/tutorials/how-to-upgrade-to-php-7-on-centos-7

However, I’ve since realised that GD Library isn’t running, as it wasn’t included with the standard PHP installation. Testing it on a Wordpress install on my droplet, the image uploads, but no other sizes are created. I’ve since found this question:

https://www.digitalocean.com/community/questions/is-there-a-php-gd-command-for-php7

…which details using apt-get to install php-gd for PHP7, but I can’t find anything that works for yum. I am pretty new to server setups so I’m stumbling around in the dark a bit here.