Using WordPress ‘is_main_network()’ PHP function
Determines whether a network is the main network of the Multisite installation.
Network
Using WordPress ‘get_user_count()’ PHP function
Returns the number of active users in your installation.
Using WordPress ‘ms_load_current_site_and_network()’ PHP function
Identifies the network and site of a requested domain and path and populates the corresponding network and site global objects as part of the multisite bootstrap process.
Using WordPress ‘network_step2()’ PHP function
The `network_step2()` function in WordPress displays step 2 of the Network installation process, which can be customized using parameters such as an optional error object or various conditions