Here is an interesting link to a tutorial series on data structures by Vaidehi Joshi on dev.to. She covers the basics with a nice mix of text and sketches, which is easily understandable.
This series made me to implementing the basics into a PHP package, so I understand these data structures better. You can find the php-datastructures package on GitHub.
So you want to secure your website with a SSL certificate and you want to use the free service Let’s Encrypt on your shared hosting web space. Here is how I did it.
My web space runs on a Hosteurope WebHosting Medium package (no ssh access), my local machine is on macOS.
It is not possible to obtain the certificates directly on the server when on a shared hosting without SSH access. You have to get these locally and upload them to the server.
To perform the installation of the certificates, you need the Certbot client and a ftp browser to upload the certificates to your web space, I recommend Cyberduck. Continue Reading