How to change session_save_path in php.ini file?

Check other files, for example: php_value[session.save_path] in /etc/php-fpm.d/www.conf and webservers users should have rights..

It is session.save_path and not sessions.save_path (it may have been renamed or something, I don't know, but sessions.save_path did not work for me)

session.save_path = "/path/to/your/folder" 

works fine

It is also important to note that session.save_path must be called before session_start()

You can modify the session save path on shared hosting by creating a custom php.ini.

Include this in your file: session.save_path = "/path/to/your/folder"

Otherwise, you can use:

ini_set('session.save_path', '/path/to/your/folder')

The folder you use should be under your domain/account but not accessible through a Web browser. It also needs to have world-writable permissions on it. And every page that uses sessions must include that line.