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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 |
---|---|
4643 | * |
4644 | * Therefore, if you are looking to only fire a callback when a post is first |
4645 | * transitioned to a status, use the {@see 'transition_post_status'} hook instead. |
4646 | * |
4647 | * @since 2.3.0 |
4648 | * |
4649 | * @param int $post_id Post ID. |
4650 | * @param WP_Post $post Post object. |
4651 | */ |
4652 | do_action( "{$new_status}_{$post->post_type}", $post->ID, $post ); |
4653 | } |
4654 |
|
4655 | // |
4656 | // Comment, trackback, and pingback functions. |
4657 | // |
4658 |
|
4659 | /** |
4660 | * Add a URL to those already pinged. |
4661 | * |