Using WordPress ‘is_network_only_plugin()’ PHP function
Checks for “Network: true” in the plugin header to see if this should be activated only as a network wide plugin. The plugin would also work when Multisite is not…
Activation
Using WordPress ‘install_theme_information()’ PHP function
Learn how to use the WordPress 'install_theme_information()' PHP function to display theme information in various ways such as a dialog box or on an admin page
Using WordPress ‘install_global_terms()’ PHP function
The `install_global_terms()` function is a built-in WordPress function that installs global terms used across the entire WordPress multisite network
Using WordPress ‘iis7_save_url_rewrite_rules()’ PHP function
Updates the IIS web.config file with the current rules if it is writable.
Using WordPress ‘is_child_theme()’ PHP function
The `is_child_theme()` function in WordPress is used to check whether a child theme is currently being used or not
Using WordPress ‘maybe_disable_link_manager()’ PHP function
Disables the Link Manager on upgrade if, at the time of upgrade, no links exist in the DB.
Using WordPress ‘maybe_convert_table_to_utf8mb4()’ PHP function
If a table only contains utf8 or utf8mb4 columns, convert it to utf8mb4.
Using WordPress ‘make_db_current_silent()’ PHP function
Updates the database tables to a new schema, but without displaying results.
Using WordPress ‘make_db_current()’ PHP function
The `make_db_current()` function in WordPress updates the database tables to a new schema