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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 |
|---|---|
| 2056 | |
| 2057 | /** |
| 2058 | * Filters the comment moderation email headers. |
| 2059 | * |
| 2060 | * @since 2.8.0 |
| 2061 | * |
| 2062 | * @param string $message_headers Headers for the comment moderation email. |
| 2063 | * @param int $comment_id Comment ID. |
| 2064 | */ |
| 2065 | $message_headers = apply_filters( 'comment_moderation_headers', $message_headers, $comment_id ); |
| 2066 | |
| 2067 | foreach ( $emails as $email ) { |
| 2068 | $user = get_user_by( 'email', $email ); |
| 2069 | |
| 2070 | if ( $user ) { |
| 2071 | $switched_locale = switch_to_user_locale( $user->ID ); |
| 2072 | } else { |
| 2073 | $switched_locale = switch_to_locale( get_locale() ); |
| 2074 | } |