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+--- Thread: CI 3.X Session Core problems (/showthread.php?tid=70461)
CI 3.X Session Core problems - kingmet - 04-12-2018
My program occasionally appears with the following error：
Fatal error: Class CI_Session_files_driver contains 5 abstract method and must therefore be declared abstract or implement the remaining methods.
![[Image: 1523595699WechatIMG176.jpeg]](https://noobiepublic.oss-cn-shenzhen.aliyuncs.com/picture/1523595699WechatIMG176.jpeg)
My configuration file is as follows：
![[Image: 1523595699WechatIMG175.jpeg]](https://noobiepublic.oss-cn-shenzhen.aliyuncs.com/picture/1523595699WechatIMG175.jpeg)
I've been searching the internet for a long time and I can't find a solution.But I go to the CI of the following system/libraries/Session/drivers found the problem。
This is Session_driver.php
![[Image: 1523596189WechatIMG177.jpeg]](https://noobiepublic.oss-cn-shenzhen.aliyuncs.com/picture/1523596189WechatIMG177.jpeg)
this is Session_files_driver.php
![[Image: 1523596189WechatIMG178.jpeg]](https://noobiepublic.oss-cn-shenzhen.aliyuncs.com/picture/1523596189WechatIMG178.jpeg)
Why implement this interface twice?I felt this would be a fatal error.I think that's why I've got a fatal error in my project.
May I ask a CI developer to tell me why? Thank you.
RE: CI 3.X Session Core problems - ciadmin - 04-13-2018
Having both classes declare that they implement the same interface can be construed as being explicit. It is *not* any sort of fatal error.
Read the error message: PHP cannot find your error view files.
It looks more likely that you upgraded from CI2 to CI3 without updating your application folder. CI2 had application/errors, whereas CI3 has application/views/errors.
RE: CI 3.X Session Core problems - Narf - 04-13-2018
https://forum.codeigniter.com/thread-64849.html
Please don't post screenshots; copy-pasting text is more than fine.
RE: CI 3.X Session Core problems - kingmet - 04-13-2018
(04-13-2018, 01:15 AM)ciadmin Wrote: Having both classes declare that they implement the same interface can be construed as being explicit. It is *not* any sort of fatal error.
Read the error message: PHP cannot find your error view files.
It looks more likely that you upgraded from CI2 to CI3 without updating your application folder. CI2 had application/errors, whereas CI3 has application/views/errors.
I feel like you're right, but I'm upgrading from 3.1.0 to 3.1.8, I don't think you're saying that.
RE: CI 3.X Session Core problems - kingmet - 04-16-2018
(04-13-2018, 01:20 AM)Narf Wrote: https://forum.codeigniter.com/thread-64849.html
Please don't post screenshots; copy-pasting text is more than fine.
Narf, I run WAMPServer3.1 on the windows2008 R2 as the working environment, now has been in the error, what method to solve it, with NGINX+MYSQL+PHP7 can be resolved?