How wordpress/hello-dolly works
Hello Dolly is a small WordPress admin plugin: on each admin page, WordPress invokes its notice callback, which selects and formats a random lyric and renders it; a separate admin-head callback supplies positioning CSS. The sampled source shows no persistent storage or external service. Both callbacks rely on WordPress hooks and APIs.
Main entry points: hello.php Render lyric notice
Components 13
Hello Dolly plugin
- Render lyric notice
hello.php - Select random lyric
hello.php - Embedded lyrics
hello.php - Check user locale
hello.php - Notice markup
hello.php - Emit positioning CSS
hello.php
Other components
- Admin user
- WordPress admin
- Admin notices hook
- Admin head hook
- Texturize lyric
- Translate screen text
- Rendered admin page
Connections 15
- Admin user → WordPress admin: opens page
- WordPress admin → Admin notices hook: fires
- WordPress admin → Admin head hook: fires
- Admin notices hook → Render lyric notice: dispatches
- Render lyric notice → Select random lyric: calls
- Select random lyric → Embedded lyrics: reads
- Select random lyric → Texturize lyric: formats with
- Texturize lyric → Select random lyric: returns text
- Render lyric notice → Check user locale: checks locale
- Check user locale → WordPress admin: reads locale
- Render lyric notice → Translate screen text: translates label
- Render lyric notice → Notice markup: renders
- Render lyric notice → Rendered admin page: outputs notice
- Admin head hook → Emit positioning CSS: dispatches
- Emit positioning CSS → Rendered admin page: outputs styles