I found this about Drupal:
"SERVER CONFIGURATION
--------------------
Your PHP must have the following settings:
session.save_handler user
In addition, we recommend the following settings:
session.cache_limiter none
These values are set in php.ini and can be overwritten in a .htaccess
file; you can print out your local PHP settings with PHP's phpinfo()
function."
If you can write .htaccess then your problem should hopefully be solved.
Cheers
General help
session.save_handler = user in php.ini
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