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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 |
---|---|
4470 | * |
4471 | * Therefore, if you are looking to only fire a callback when a post is first |
4472 | * transitioned to a status, use the {@see 'transition_post_status'} hook instead. |
4473 | * |
4474 | * @since 2.3.0 |
4475 | * |
4476 | * @param int $post_id Post ID. |
4477 | * @param WP_Post $post Post object. |
4478 | */ |
4479 | do_action( "{$new_status}_{$post->post_type}", $post->ID, $post ); |
4480 | } |
4481 |
|
4482 | // |
4483 | // Comment, trackback, and pingback functions. |
4484 | // |
4485 |
|
4486 | /** |
4487 | * Add a URL to those already pinged. |
4488 | * |