This database has information for all major versions from WP 1.2.1 through 5.1.
|5.0||wp-includes/user.php||3385||View in context||filter|
|5.1||wp-includes/user.php||3507||View in context||filter|
We find related hooks using word stems. user_request_action_email_subject has 5 significant word stem(s):
subject. Note that some of the hooks below may not appear in all versions of WP.