How to Install and Setup WordPress Multisite Network

You need to add the following code to your wp-config.php file just before the /* That’s all, stop editing! Happy blogging. */ line.

/* Multisite */
define( 'WP_ALLOW_MULTISITE', true );

Go inside tool and click on Network setup menu.

At there you will get some code for update wp-config and .htaccess

Remove below code from config

define( 'WP_ALLOW_MULTISITE', true );

Login again and create sub sites