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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 |
---|---|
3888 | * |
3889 | * Therefore, if you are looking to only fire a callback when a post is first |
3890 | * transitioned to a status, use the {@see 'transition_post_status'} hook instead. |
3891 | * |
3892 | * @since 2.3.0 |
3893 | * |
3894 | * @param int $post_id Post ID. |
3895 | * @param WP_Post $post Post object. |
3896 | */ |
3897 | do_action( "{$new_status}_{$post->post_type}", $post->ID, $post ); |
3898 | } |
3899 |
|
3900 | // |
3901 | // Comment, trackback, and pingback functions. |
3902 | // |
3903 |
|
3904 | /** |
3905 | * Add a URL to those already pinged. |
3906 | * |