Session support is enabled in PHP by default also configure manually to be set disabled or enabled.

How to Enable:

Open your PHP configuration php.ini file and find the word  "session.auto_start" and be ensure the config set to "On"

session.auto_start=On


Also can be set in .htaccess file and add below line,


php_value session.auto_start 1

session.name = session


How to Disable:

You can easily turn it off session in PHP in few lines code,

Open a php.ini file and check the below line,

session.auto_start=Off

or
session.auto_start = "0"


Another option is open a .htaccess file and add below line


php_value session.auto_start 0 

session.name = session

If you have specific user with different path in apache server also add below line,


suPHP_ConfigPath /home/username/public_html