I have installed the latest kirby starter kit. The installation is working, i can see all the default pages. When I go to the panel install page I see the form but trying to submit it returns me back to the form.
With 'debug',true in the config file I got the following message:
Warning: session_start(): open(/var/lib/php/session/sess_096d73rupkof7utnfof7gs4nd4, O_RDWR) failed: Permission denied (13) in /var/www/vhosts/holmesarchive.com/melgrafik.cuboctaedro.eu/kirby/toolkit/lib/s.php on line 54
Warning: Unknown: open(/var/lib/php/session/sess_096d73rupkof7utnfof7gs4nd4, O_RDWR) failed: Permission denied (13) in Unknown on line 0
Warning: Unknown: Failed to write session data (files). Please
verify that the current setting of session.save_path is correct
(/var/lib/php/session) in Unknown on line 0
The session.save path is set to /var/lib/php/session (the default).
The accounts and thumbs folders exist and writable.
I have managed to solve it using Kucko’s method, inserting session_save_path(sys_get_temp_dir()) in the toolkit file that handles sessions. It works fine but hacking the toolkit is probably not the best solution.
Unfortunately the session_save_path(sys_get_temp_dir()) solution isn’t something we can make the default. It can create very severe security risks if the website is hosted on a shared server and the temp directory is shared as well.
Using this fix is indeed a hack. You should fix it directly in the php.ini or ask your hosting provider to do so. This issue does not only affect Kirby, it affects all PHP CMS.
I have a .user.ini as my site is on a shared host in a large university. I followed @lukasbestle’s advice and set the session.save_path there. One note though, I had to use the full path to the sessions directory in order for it to work (https://stackoverflow.com/a/12722208).