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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 |
|---|---|
| 1796 | |
| 1797 | /** |
| 1798 | * Filters the comment moderation email headers. |
| 1799 | * |
| 1800 | * @since 2.8.0 |
| 1801 | * |
| 1802 | * @param string $message_headers Headers for the comment moderation email. |
| 1803 | * @param int $comment_id Comment ID. |
| 1804 | */ |
| 1805 | $message_headers = apply_filters( 'comment_moderation_headers', $message_headers, $comment_id ); |
| 1806 | |
| 1807 | foreach ( $emails as $email ) { |
| 1808 | @wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers ); |
| 1809 | } |
| 1810 | |
| 1811 | if ( $switched_locale ) { |
| 1812 | restore_previous_locale(); |
| 1813 | } |
| 1814 | |