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Heloo, I have this error:

Fatal error: Class CI_Session_files_driver contains 2 abstract methods and must therefore be declared abstract or implement the remaining methods (SessionHandlerInterface::open, SessionHandlerInterface::read) in D:\wamp64\www\has\system\libraries\Session\drivers\Session_files_driver.php on line 49

I have tried proposed solutions from forums and I have replaced the system folder of CI 3 but still no luck. Restarting apache fixes the problem temporary. But after a while, it still comes back. Here is my working environment:

Windows 10 64 bit Pro; Wamp Server 3.1.0; PHP Version 7.1.10; Codeigniter 3.1.6;

What is very interesting, i have two other projects on this Wamp Server that are on Codeigniter 2, and they dont seem to have this problem. I noticed this when i switched from PHP5 to PHP7. Any ideas or thoughts?

ronald8192
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Martin k
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2 Answers2

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Some one reported similar issue on Github: PHP >= 7 session problem, which link to the solution, turn off opcache in php.ini:

opcache.enable=0

Hope this is the solution you are looking for, currently I don't have the setup to reproduce the error.

ronald8192
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  • I already saw that solution, but opcache is already disabled in my configuration. Any other thoughts? – Martin k Oct 26 '17 at 10:33
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Class CI_Session_files_driver contains 2 abstract methods and must therefore be declared abstract or implement the remaining methods (SessionHandlerInterface::open, SessionHandlerInterface::close) using Codeigniter

The one of the reason for this error is recursive function calling with no ending.

Vijayakumar
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