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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 |
---|---|
4682 | * |
4683 | * Therefore, if you are looking to only fire a callback when a post is first |
4684 | * transitioned to a status, use the {@see 'transition_post_status'} hook instead. |
4685 | * |
4686 | * @since 2.3.0 |
4687 | * |
4688 | * @param int $post_id Post ID. |
4689 | * @param WP_Post $post Post object. |
4690 | */ |
4691 | do_action( "{$new_status}_{$post->post_type}", $post->ID, $post ); |
4692 | } |
4693 |
|
4694 | // |
4695 | // Comment, trackback, and pingback functions. |
4696 | // |
4697 |
|
4698 | /** |
4699 | * Add a URL to those already pinged. |
4700 | * |