[solved]Admin showing blank page after Update PHP from 5.5 to 5.6

[jailani2k]

Hi, am running prestashop 1.6.1.6 and I have updated my PHP version from 5.5 to 5.6 after Update front end is working fine, But admin showing blank screen. I enabled error log also But not showing any error. I tried these solutions https://stackoverflow.com/questions/11335073/prestashop-cant-login-in-admin, https://www.prestashop.com/forums/topic/213049-solution-for-admin-login-problem/

But nothing works. Please help me to fix this. 

[selectshop.at]

1) Read error logs from server. If you don't have access, so ask your provider.

2) Delete manually cache files on ftp /cache/smarty/compile delete all folders and files EXCEPT index.php and last_flush (if available).

3) Clear the cache and cookies of your browser.

4) if you was using external cache module of php 5.5 (APC, xCache, memcache), so change the line of your

/config/settings.inc.php as follows:

define('_PS_CACHING_SYSTEM_', '');

[jailani2k]

Hi, Thanks for your reply. 
I already checked with server error logs. There also no errors. 
I already renamed the cache file its created new cache file 
I cleared the cache and cookies in browser and tried that too, I tried with incognito window also. 
we does not using external cache 
what I need to do ?

[selectshop.at]

The error you are having is a cache problem. Try to delete cache several times, also the one of browser. If nothing solve, than try tomorrow or in 3 days, optionally you can ask your provider to flush the cache of the server.

 

You changed the lines of  your settings.inc.php as I told you ?

define('_PS_CACHING_SYSTEM_', '');
define('_PS_CACHE_ENABLED_', '0');

[jailani2k]

Yes, I tried these codes from settings.inc.php but no success. 

define('_PS_CACHING_SYSTEM_', '');
define('_PS_CACHE_ENABLED_', '0');

[selectshop.at]

As I told before. It is a cache problem on your server. You should contact your provider and ask for to flush the cache on server, or wait still the server renews it's cache by himself, normally 3 days.

 

Furthermore as it is a change made b your provider, he should put your site working again. It his fault, making changes on the server without prior advice/test if sites will continue to work.

[jailani2k]

Thanks for your quick reply.  I already asked him to flush the cache from server and he did that also again the same blank page. really I dont know the way to solve this. 

[selectshop.at]

Switch back to php 5.5

[jailani2k]

am getting fear to bring back. After bring back old php version if error still exist what should I do? there is any procedure? Please let me know any way to solve this issue. 

[Scully]

I don't believe there is no error in your logfiles.

Would you mind to access your admin page and show the last 50 lines of your access and error log here?

The logst should be retrieved immediately after your access attempts.

 

I haven't seen any case where a blank page did NOT result in an error log entry over 20 years now.

[jailani2k]

Hi, Thank you very much for your replies. Its got work now automatically.     

[Scully]

automatically? That seems almost the best way. The very best way would be to know why the error happened.

[selectshop.at]

Hi, Thank you very much for your replies. Its got work now automatically.     

This was what I told you before.... wait 3 days. It is a server cache problem. And your provider seems to don't flushed the correct cache. Perhaps he flushed DNS cache instead...