email exists in database

Question

I'm creating a web site for educatio and implementing a newdletter subscription system.. IRegistration process works fine}, even the emauls are correctly sent....BUT..... if i use the same address twenty times....i have twenty registry with the same email.....need help!!

here the code ...

Answer 1

I don't see anything calling your functions.
You insert them without calling emailExiste function.
Is this your code?

Codes like sending emails should be located outside your web root

Answer 2

Where is the code?

Maybe check if address already exists, but I can only guess without code.

Answer 3

i'm really sorry...i forget to paste the code...there is...

https://code.sololearn.com/Wp3dg17TZQLs/?ref=app