Hello everyone, I'm new here. Nice to meet you.
I have a question I think involves sessions. My problem I'm thinking is...
1) I have someone log into my application.
2) The user has to add his "username","password".
3) My application checks the database to see if the username/password already exists.
4) My application returns, "username"/"password" does not exist..."username/password" added to database.
MY QUESTION.
what if 5 people are logging in and checking the data at the same time. Do sessions prevent more than one user viewing or modifying the data in a single instance? I want to prevent someone adding a password that doesn't exist at the same time someone may be adding that password.
Please help me understand this process, if sessions don't take care of that and I don't have to worry then how does one implement code to prevent an error.
best regards,
Hassan