Fires immediately after an existing user is added to a site.
add_new_user_to_blog
Adds a newly created user to the appropriate blog
add_existing_user_to_blog
Add a user to a blog based on details from maybe_add_existing_user_to_blog().
maybe_add_existing_user_to_blog
Add a new user to a blog by visiting /newbloguser/{key}/.
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blog_redirect_404
Filters the redirect URL for 404s on the main site.
maybe_redirect_404
Correct 404 redirects when NOBLOGREDIRECT is defined.
signup_nonce_check
Process the signup nonce created in signup_nonce_fields().
upload_is_file_too_big
Check whether an upload is too big.
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signup_nonce_fields
Add a nonce field to the signup page.
redirect_this_site
Ensure that the current site’s domain is listed in the allowed redirect host list.
global_terms
Maintains a canonical list of terms by syncing terms created for each blog with the global terms table.
update_posts_count
Update a blog’s post count.
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wpmu_log_new_registrations
Logs the user email, IP, and registration date of a new site.
check_upload_mimes
Check an array of MIME types against a whitelist.
get_most_recent_post_of_user
Get a user’s most recent post.
