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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 |
---|---|
4816 | * Fires when a post is transitioned from one status to another. |
4817 | * |
4818 | * The dynamic portions of the hook name, `$new_status` and `$old status`, |
4819 | * refer to the old and new post statuses, respectively. |
4820 | * |
4821 | * @since 2.3.0 |
4822 | * |
4823 | * @param WP_Post $post Post object. |
4824 | */ |
4825 | do_action( "{$old_status}_to_{$new_status}", $post ); |
4826 |
|
4827 | /** |
4828 | * Fires when a post is transitioned from one status to another. |
4829 | * |
4830 | * The dynamic portions of the hook name, `$new_status` and `$post->post_type`, |
4831 | * refer to the new post status and post type, respectively. |
4832 | * |
4833 | * Please note: When this action is hooked using a particular post status (like |
4834 | * 'publish', as `publish_{$post->post_type}`), it will fire both when a post is |