I did not really attempt to use it on any other PHP installations, so it might explain being broken easily. I use shorthands a lot, I might just change it to the default ones to avoid errors.
When you edited your first (empty) page, did you use password "admin" or you generated a new hashed password? It might have something to do with another PHP settings that doesn't allow you to create files unless you chmod the directory.
Any additional info is appreciated, I'm really looking to improve it for people to use WikiMind on their own.
Following llagerlof's indications I could make it work with the default password, tested with PHP 7.4.21 and 8.0.8, chmod 755. The meta tags for charset and viewport were merged (?) so I corrected that too, here's the modified file: https://www.pastery.net/zbfwuf/
Great project, thank you. I felt a little stupid when trying to create a new page, then remembered the way of the Wiki and appended ?new-page to the URL, of course. Maybe add this info in the description?
Thank you. Based on your modification, I decided to vent the code to improve it a bit. As suggested, syntax code got added in placeholder of the textarea when a page is created. Example here (just an empty page): https://mindwi.se/?testtest
All the h3 titles below (where lines start with ###) can be linked to using this format: [displayed text](#title)