MySQL
User records held relationally, read and written through PDO prepared statements.
00 Signup / Login / Profile
A registration, login and profile system built on strict separation: static frontend, JSON APIs, three stores each doing one job.
User records held relationally, read and written through PDO prepared statements.
Sessions are custom tokens in memory. No PHP session state, no cookies to leak.
Every registration, login and profile update lands in the audit log as a document.