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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 |
|---|---|
| 1584 | |
| 1585 | /** |
| 1586 | * Filter the comment moderation email headers. |
| 1587 | * |
| 1588 | * @since 2.8.0 |
| 1589 | * |
| 1590 | * @param string $message_headers Headers for the comment moderation email. |
| 1591 | * @param int $comment_id Comment ID. |
| 1592 | */ |
| 1593 | $message_headers = apply_filters( 'comment_moderation_headers', $message_headers, $comment_id ); |
| 1594 | |
| 1595 | foreach ( $emails as $email ) { |
| 1596 | @wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers ); |
| 1597 | } |
| 1598 | |
| 1599 | return true; |
| 1600 | } |
| 1601 | endif; |
| 1602 | |