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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 |
|---|---|
| 1617 | * Fires when the comment status is in transition from one specific status to another. |
| 1618 | * |
| 1619 | * The dynamic portions of the hook name, `$old_status`, and `$new_status`, |
| 1620 | * refer to the old and new comment statuses, respectively. |
| 1621 | * |
| 1622 | * @since 2.7.0 |
| 1623 | * |
| 1624 | * @param WP_Comment $comment Comment object. |
| 1625 | */ |
| 1626 | do_action( "comment_{$old_status}_to_{$new_status}", $comment ); |
| 1627 | } |
| 1628 | /** |
| 1629 | * Fires when the status of a specific comment type is in transition. |
| 1630 | * |
| 1631 | * The dynamic portions of the hook name, `$new_status`, and `$comment->comment_type`, |
| 1632 | * refer to the new comment status, and the type of comment, respectively. |
| 1633 | * |
| 1634 | * Typical comment types include an empty string (standard comment), 'pingback', |
| 1635 | * or 'trackback'. |