PHP Warning: Unknown: Failed to write session data
in Php Web Application , Login suddenly stop working .
so i check more about it and i got following error
write failed: No space left on device (28) in Unknown on line 0
PHP Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
or you can go to php.ini check where is the session.save_path and its value will show you path of the folder where session file get saved . and make sure that folder exist.
in error it self says tmp folder exists in your server or it have write access enable