Filters the upload quota for the current site.
pre_get_space_used
Filters the amount of storage space used by the current site, in megabytes.
enable_live_network_counts
This filter is documented in wp-includes/ms-functions.php
added_existing_user
Fires immediately after an existing user is added to a site.
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blog_redirect_404
Filters the redirect URL for 404s on the main site.
update_welcome_user_subject
Filters the subject of the welcome email after user activation.
update_welcome_user_email
Filters the content of the welcome email after user activation.
wpmu_welcome_user_notification
Filters whether to bypass the welcome email after user activation.
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update_welcome_subject
Filters the subject of the welcome email after site activation.
update_welcome_email
Filters the content of the welcome email after site activation.
wpmu_welcome_notification
Filters whether to bypass the welcome email after site activation.
domain_exists
Filters whether a site name is taken.
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newuser_notify_siteadmin
Filters the message body of the new user activation email sent to the network administrator.
newblog_notify_siteadmin
Filters the message body of the new site activation email sent to the network administrator.
wpmu_new_user
Fires immediately after a new user is created.