I am going to use the following class which is very simple to use and get user info in pages:
For signup / login / reset password
Questions:
Is this class secure against all kinds of attacks (XSS, CSRF, SQL injection, session hijacking, cookie attacks, ...)?
I just want an exact thing which is simple and secure to use, but I don't know if I can trust this one.
I also saw something weird: 2 people can be logged in the same account and use the account at the same time (I can login with two different browser at the same time and neither logs out). Is this a security issue? What is this called and should it be fixed?
Is there any better all-in-one class I can use (free or commercial is not important)? I mean something exactly like this but completely secure and reliable.