annoying session/interface problem

hello
in codeigniter v3 i'm facing an annoying problem related to session
and recently appears much times which become annoying

PHP Code:

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 Z:\project\system\libraries\Session\drivers\Session_files_driver.php on line 49 


i looked for it but the only solution i found is restart the Apache , OK that a temp solution but when it appear repeatedly i can not take it as a solution anymore.

so i looked into system folder at these files :

• Session.php
  Session_driver.php
  Session_files_driver.php
  SessionHandlerInterface.php
  

i know that i shouldn't edit any system files but i want to figure out the problem , in the end
i removed

PHP Code:

implements SessionHandlerInterface 


from each of these files:

• Session_driver.php
  Session_files_driver.php
  

and the error disappeared but session not works properly

so can anyone suggest a permanent solution for this problem because removing interface implementing is not a solution?!

Since you can restart Apache and it works for a while, it seems like your problem is the server not CI. Have you looked at your error logs and tried to see if there are any helpful hints?

Expert Website Development - Temecula, CA
Community Auth For CodeIgniter 3

Since you can restart Apache and it works for a while, it seems like your problem is the server not CI. Have you looked at your error logs and tried to see if there are any helpful hints?

What did you mean saying "problem is the server not CI"? What can be wrong with srver?

I got this error after I update CI2 > CI3.

I use Win Server 2008 R2 Standart, Appache 2.4, PHP 7.0.16

After restart Apache error is disappearing but a litle and then appears again...