Fires when a site’s initialization routine should be executed.
wp_insert_site
Fires once a site has been inserted into the database.
ms_loaded
Fires after the current site and network have been detected and loaded in multisite’s bootstrap.
clean_network_cache
Fires immediately after a network has been removed from the object cache.
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get_network
Fires after a network is retrieved.
ms_site_not_found
Fires when a network can be determined but a site cannot.
ms_network_not_found
This action is documented in wp-includes/ms-settings.php
pre_get_site_by_path
Determine a site by its domain and path.
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site_by_path_segments_count
Filters the number of path segments to consider when searching for a site.
ms_site_check
Filters checking the status of the current blog.
network_admin_email_change_email
Filters the contents of the email notification sent when the network admin email address is changed.
send_network_admin_email_change_email
Filters whether to send the network admin email change notification email.
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new_network_admin_email_content
Filters the text of the email sent when a change of network admin email address is attempted.
subdirectory_reserved_names
Filters reserved site names on a sub-directory Multisite installation.
wp_is_large_network
This filter is documented in wp-includes/ms-functions.php