Using WordPress ‘customize_post_value_set_{$setting_id}’ PHP action
The 'customize_post_value_set_{$setting_id}' PHP action in WordPress modifies Customizer settings with $value and $setting parameters.
wp_mail()
Using WordPress ‘created_term’ PHP action
The `created_term` WordPress PHP action is fired after a new term is created and after the term cache has been cleaned
Using WordPress ‘comment_post’ PHP action
Learn how to use the WordPress 'comment_post' PHP action in this informative article
Using WordPress ‘auto_core_update_email’ PHP filter
WordPress auto_core_update_email filter allows developers to customize automatic update notifications sent to site administrators.