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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 |
|---|---|
| 5394 | * transitioned to a status, use the {@see 'transition_post_status'} hook instead. |
| 5395 | * |
| 5396 | * @since 2.3.0 |
| 5397 | * @since 5.9.0 Added `$old_status` parameter. |
| 5398 | * |
| 5399 | * @param int $post_id Post ID. |
| 5400 | * @param WP_Post $post Post object. |
| 5401 | * @param string $old_status Old post status. |
| 5402 | */ |
| 5403 | do_action( "{$new_status}_{$post->post_type}", $post->ID, $post, $old_status ); |
| 5404 | } |
| 5405 | |
| 5406 | /** |
| 5407 | * Fires actions after a post, its terms and meta data has been saved. |
| 5408 | * |
| 5409 | * @since 5.6.0 |
| 5410 | * |
| 5411 | * @param int|WP_Post $post The post ID or object that has been saved. |
| 5412 | * @param bool $update Whether this is an existing post being updated. |