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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 |
|---|---|
| 1065 | $reply_to = "Reply-To: \"$comment->comment_author_email\" <$comment->comment_author_email>"; |
| 1066 | } |
| 1067 | |
| 1068 | $message_headers = "$from\n" |
| 1069 | . "Content-Type: text/plain; charset=\"" . get_option('blog_charset') . "\"\n"; |
| 1070 | |
| 1071 | if ( isset($reply_to) ) |
| 1072 | $message_headers .= $reply_to . "\n"; |
| 1073 | |
| 1074 | $notify_message = apply_filters('comment_notification_text', $notify_message, $comment_id); |
| 1075 | $subject = apply_filters('comment_notification_subject', $subject, $comment_id); |
| 1076 | $message_headers = apply_filters('comment_notification_headers', $message_headers, $comment_id); |
| 1077 | |
| 1078 | @wp_mail( $author->user_email, $subject, $notify_message, $message_headers ); |
| 1079 | |
| 1080 | return true; |
| 1081 | } |
| 1082 | endif; |
| 1083 | |