php - CodeIgniter Database Session Error

Question

When I try to execute any controller of my CodeIgniter project i receive this error:

Fatal error: Class CI_Session_files_driver contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (SessionHandlerInterface::read) in D:Gitcrud-farmsystemlibrariesSessiondriversSession_files_driver.php on line 49
A PHP Error was encountered

Severity: Error

Message: Class CI_Session_files_driver contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (SessionHandlerInterface::read)

Filename: drivers/Session_files_driver.php

Line Number: 49

Backtrace:

I tried to replace CodeIgniter system files but it didn't work. The problem appears in all projects

Answer 1

Problem solved by restarting Apache.

I attach the url which saved me: http://forum.codeigniter.com/thread-64763.html