Filters the validated user registration details.
is_email_address_unsafe
Filters whether an email address is unsafe.
remove_user_from_blog
Fires before a user is removed from a site.
add_user_to_blog
Fires immediately after a user is added to a site.
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can_add_user_to_blog
Filters whether a user should be added to a site.
make_ham_user
Fires after the user is marked as a HAM user. Opposite of SPAM.
make_spam_user
Fires after the user is marked as a SPAM user.
graceful_fail_template
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graceful_fail
switch_blog
This filter is documented in wp-includes/ms-blogs.php
blog_option_{$option}
Filters a blog option value.
wpmu_blog_updated
Fires after the blog details are updated.
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get_object_subtype_{$object_type}
Filters the object subtype identifier for a non standard object type.
register_meta_args
Filters the registration arguments when registering meta.
sanitize_{$object_type}_meta_{$meta_key}
Filters the sanitization of a specific meta key of a specific meta type.