A simple MySQLi and PHP verification system, which allows you to generate a desired number of codes, whose will then be stored in a database. The codes mentioned can then be queried in the registration system and are then deleted upon approval, so that no further access is possible.
Please let me know if you want any other feature to be added to this project. I am thinking of a limited use feature for codes, or make the codes expire after some time.
Also let me know if you find any security issues/risks within my project, so I can sort them out asap. -xyba | discord: xyba#2085