PHP session handler using redis not work

Solution 1:

Sessions settings may be altered in other configuration files, except php.ini. This may be confirmed checking the "session" section of phpinfo() output. If the values in column "Local Value" are different of those in column "Master Value", other files must be inspected.
Specifically in Centos, on server 192.168.7.162, it is very probable to have the session.save_handler set to "files", in /etc/httpd/conf.d/php.conf .

Solution 2:

Check under php-fpm configuration also . After a long inspection i found this. If you are on linux do grep to find where and your configuration is modified , for example grep -r "save_handler" /etc/ it will be do text search and reveal the files.

/etc/php-fpm.d/www.conf