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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 |
|---|---|
| 382 | } |
| 383 | |
| 384 | $message_headers = "MIME-Version: 1.0\n" |
| 385 | . "$from\n" |
| 386 | . "Content-Type: text/plain; charset=\"" . get_settings('blog_charset') . "\"\n"; |
| 387 | |
| 388 | if ( isset($reply_to) ) |
| 389 | $message_headers .= $reply_to . "\n"; |
| 390 | |
| 391 | $notify_message = apply_filters('comment_notification_text', $notify_message, $comment_id); |
| 392 | $subject = apply_filters('comment_notification_subject', $subject, $comment_id); |
| 393 | $message_headers = apply_filters('comment_notification_headers', $message_headers, $comment_id); |
| 394 | |
| 395 | @wp_mail($user->user_email, $subject, $notify_message, $message_headers); |
| 396 | |
| 397 | return true; |
| 398 | } |
| 399 | endif; |
| 400 | |