I hope you're doing well. I am currently working on a project where I am using PHP to handle user input via a form and store it in a MySQL database. Everything is working smoothly so far, but I have encountered a small issue.
I have a field in my form where users can enter their name, and I want to make sure that each user's name is unique in the database. In other words, I don't want two users with the same name to be stored in the database.
I have already implemented server-side validation to check if the name field is empty and display an error message if it is. However, I am not sure how to make it unique.
I have heard about using SQL queries to check if a value already exists in the database before inserting a new record, but I am unsure of the specific steps to achieve this. Can someone please guide me on how to make the PHP post variable for the name field unique?
Thanks in advance for your help!