Blank page problem again, with a temporary quick fix, but unfortunately not stable.
First of all, I am not a PHP or Tiki expert, but just a user with some knowledge. My problem is the not so unusual problem with blank pages from time to time. I am running a couple of instances of Tiki for different purposes and for tests. The problem is that the different sites may work as expected for some time. However, suddenly, without any logical explanation, they only show up with blank pages (but not all at the same time of course).
By "trial and error, " I have found a quick fix by performing a "virtual upgrade". I call it "virtual upgrade" since I am invoking the tiki-install.php without uploading an updated package. During the installation process, I choose the upgrade option. After this "virtual upgrade, " the site is up and running again, but unfortunately only for some limited time. The site may after some different long periods suddenly show blank pages again without anything being changed (neither editing nor config change).
During the "virtual upgrade" (version 9.10) the following error messages show up (perhaps some clues?):
PHP (5.3.29) NOTICE (E_NOTICE):
File: lib/cache/cachelib.php
Line: 207
Type: Undefined index: wikiplugin_rr
PHP (5.3.29) NOTICE (E_NOTICE):
File: lib/cache/cachelib.php
Line: 207
Type: Undefined index: wikiplugin_r
PHP (5.3.29) NOTICE (E_NOTICE):
File: lib/cache/cachelib.php
Line: 207
Type: Undefined index: wikiplugin_rr
PHP (5.3.29) NOTICE (E_NOTICE):
File: lib/cache/cachelib.php
Line: 207
Type: Undefined index: wikiplugin_r
PHP (5.3.29) NOTICE (E_NOTICE):
File: lib/cache/cachelib.php
Line: 207
Type: Undefined index: wikiplugin_rr
PHP (5.3.29) NOTICE (E_NOTICE):
File: lib/cache/cachelib.php
Line: 207
Type: Undefined index: wikiplugin_r
PHP (5.3.29) NOTICE (E_NOTICE):
File: lib/cache/cachelib.php
Line: 207
Type: Undefined index: wikiplugin_rr
PHP (5.3.29) NOTICE (E_NOTICE):
File: lib/cache/cachelib.php
Line: 207
Type: Undefined index: wikiplugin_r
Right now, I have performed this quick fix on http://lugnet-skokloster.org/lugnet/index.php (Tiki ver 9.10). As an example of presently blank pages are http://www.fam-jansson.net/lugnet/index.php (ver 9.6) and http://wikipilot.info/sas/index.php (ver 7.1) since I have not applied the quick fix on these yet.