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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 |
|---|---|
| 3027 | } elseif ( 'trash' == $status ) { |
| 3028 | |
| 3029 | /** |
| 3030 | * Fires when a comment is attempted on a trashed post. |
| 3031 | * |
| 3032 | * @since 2.9.0 |
| 3033 | * |
| 3034 | * @param int $comment_post_ID Post ID. |
| 3035 | */ |
| 3036 | do_action( 'comment_on_trash', $comment_post_ID ); |
| 3037 | |
| 3038 | return new WP_Error( 'comment_on_trash' ); |
| 3039 | |
| 3040 | } elseif ( ! $status_obj->public && ! $status_obj->private ) { |
| 3041 | |
| 3042 | /** |
| 3043 | * Fires when a comment is attempted on a post in draft mode. |
| 3044 | * |
| 3045 | * @since 1.5.1 |