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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 5390 | * |
| 5391 | * - `draft_to_publish` |
| 5392 | * - `publish_to_trash` |
| 5393 | * - `pending_to_draft` |
| 5394 | * |
| 5395 | * @since 2.3.0 |
| 5396 | * |
| 5397 | * @param WP_Post $post Post object. |
| 5398 | */ |
| 5399 | do_action( "{$old_status}_to_{$new_status}", $post ); |
| 5400 | |
| 5401 | /** |
| 5402 | * Fires when a post is transitioned from one status to another. |
| 5403 | * |
| 5404 | * The dynamic portions of the hook name, `$new_status` and `$post->post_type`, |
| 5405 | * refer to the new post status and post type, respectively. |
| 5406 | * |
| 5407 | * Possible hook names include: |
| 5408 | * |