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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 |
|---|---|
| 3270 | } elseif ( 'trash' == $status ) { |
| 3271 | |
| 3272 | /** |
| 3273 | * Fires when a comment is attempted on a trashed post. |
| 3274 | * |
| 3275 | * @since 2.9.0 |
| 3276 | * |
| 3277 | * @param int $comment_post_ID Post ID. |
| 3278 | */ |
| 3279 | do_action( 'comment_on_trash', $comment_post_ID ); |
| 3280 | |
| 3281 | return new WP_Error( 'comment_on_trash' ); |
| 3282 | |
| 3283 | } elseif ( ! $status_obj->public && ! $status_obj->private ) { |
| 3284 | |
| 3285 | /** |
| 3286 | * Fires when a comment is attempted on a post in draft mode. |
| 3287 | * |
| 3288 | * @since 1.5.1 |