[support] Blank page of death after permission change

[Earnie Boyd]

Quoting Walter Garcia-Fontes <walter.garcia at upf.edu>:

> I have found out recently that on the admin page for administering
> permissions after changing any permission I get a "blank page of
> death". The permission is changed anyway, and everything else
> continues working normally after hitting the "back" key or opening any
> part of my site.
>
> I'm using 5.6 (planning to update to 5.7 anytime soon, but haven't
> found the time to do it).
>
> How would I go diagnosing this? Which logs are useful to check, or
> anything else that would help me diagnosing a "blank page of death"?
> It's sort of frustrating to not get any type of error message in this
> type of situations.
>

Usually caused by some PHP error; of which out of memory is the most 
common.  Check the watchdog log admin/logs/watchdog to see if there are 
any php errors posted there.  Else check the logs for your php 
environment.

You can also modify the .htaccess and add

php_value display_errors 1
php_value memory_limit 64M

The display_errors should only be used for debugging and set to zero 
for production.  The memory_limit can be adjusted higher and be a 
permanent addition or you can modify the php.ini file to set it 
globally for all applications using php.

Earnie -- http://for-my-kids.com/
-- http://give-me-an-offer.com/