Avoids a collision between a site slug and a permalink slug.
site_admin_notice
Displays an admin notice to upgrade all sites after a core upgrade.
mu_dropdown_languages
Generates and displays a drop-down of available languages.
check_import_new_users
Checks if the current user has permissions to import new users.
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_access_denied_splash
Displays an access denied message when a user tries to view a site’s dashboard they do not have access to.
sync_category_tag_slugs
Synchronizes category and post tag slugs when global terms are enabled.
format_code_lang
Returns the language for a language code.
refresh_user_details
Cleans the user cache for a specific user.
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upload_space_setting
Displays the site upload space quota setting form on the Edit Site Settings screen.
fix_import_form_size
Get the remaining upload space for this site.
display_space_usage
Displays the amount of disk space used by the current site. Not used in core.
upload_is_user_over_quota
Check whether a site has used its allotted upload space.
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wpmu_delete_user
Delete a user from the network and remove from all sites.
wpmu_delete_blog
Delete a site.
check_upload_size
Determine if uploaded file exceeds space quota.