Check if email already exists in database

Question

I have a quiz form that is connected to my database, however I need to prevent duplicate email entries being inserted. I have tried the following:

//Check for d         


        

Answer 1

Two problems:

1. You're never calling your checkEmail() function so it's never running. You should either remove that code from the function or just call the function where it needs to run.
2. In that function you're checking that no email exists that literally equals "$email". PHP will only parse variables in double quotes - change that line to use where('email','=',"$email") instead.