Scan a WordPress theme or plugin for functions that are attached to hooks and filters and for any custom actions or filters that are added by the code
Using WP Hook Finder couldn't be any easier. The plugin requires no additional setup once activated.
To start using WP Hook Finder, visit the "Tools -> Hook Finder" screen, select the folder you'd like to scan and click the "Scan for Hooks" button. It's as easy as that!