user_register
Action Hook: Fires immediately after a new user is registered.
Source: wp-includes/user.php:2515
validate_username()
Function: Checks whether a username is valid.
Source: wp-includes/user.php:2015
wp_update_user()
Function: Updates a user in the database.
Source: wp-includes/user.php:2537
validate_username
Filter Hook: Filters whether the provided username is valid.
Source: wp-includes/user.php:2027
send_password_change_email
Filter Hook: Filters whether to send the password change email.
Source: wp-includes/user.php:2581
setup_userdata()
Function: Sets up global user vars.
Source: wp-includes/user.php:1520
wp_insert_user()
Function: Inserts a user into the database.
Source: wp-includes/user.php:2096
send_email_change_email
Filter Hook: Filters whether to send the email change email.
Source: wp-includes/user.php:2596
wp_dropdown_users()
Function: Creates dropdown HTML content of users.
Source: wp-includes/user.php:1611
illegal_user_logins
Filter Hook: Filters the list of disallowed usernames.
Source: wp-includes/user.php:2157