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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 |
|---|---|
| 1913 | |
| 1914 | /** |
| 1915 | * Filters the comment moderation email headers. |
| 1916 | * |
| 1917 | * @since 2.8.0 |
| 1918 | * |
| 1919 | * @param string $message_headers Headers for the comment moderation email. |
| 1920 | * @param int $comment_id Comment ID. |
| 1921 | */ |
| 1922 | $message_headers = apply_filters( 'comment_moderation_headers', $message_headers, $comment_id ); |
| 1923 | |
| 1924 | foreach ( $emails as $email ) { |
| 1925 | wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers ); |
| 1926 | } |
| 1927 | |
| 1928 | if ( $switched_locale ) { |
| 1929 | restore_previous_locale(); |
| 1930 | } |
| 1931 | |