What is Final Class in PHP?

Question

I have a question about using a php user class and session variables. Let's say that I have managed to create a user class that finds a particular person from the database query.

As I move about the site from page to page it would be nice to be able to use the current user inside the user class without needing to re – look them up in the database multiple times

Q: so is there a way to combine the current active user in the class with session variables so that they can be used multiple times? If so, how would this work?

Answer 1

Final class is a class that can never be inherited.It protects the methods of class to be overriden by the child classes.
e.g.

final class baseclass
{
public function mymethod()
{
echo "baseclass method";
}
}
class derivedclass extends baseclass
{
public function mymethod()
{
echo "derivedclass method";
}
}
$c= new derivedclass();
$c->mymethod();

In the above example base class is declared as final and hence can not be inherited.
The compiler will give error for this example as deriveclass is trying here to inherit baseclass.