Show Which Functions Run on a Hook
Lets administrators add ?wpide_hook=the_content (or any hook name) to a URL and see the callbacks attached to that hook with their priorities and source files, printed at the bottom of the page.
Snippet Library
Developer snippets for WordPress
Snippets for developers: debugging helpers, custom cron schedules, body classes, REST API tweaks and admin tools for checking hooks and queries. Building blocks for people who write code for WordPress every day.