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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 |
---|---|
441 |
|
442 | $message_headers = "MIME-Version: 1.0\n" |
443 | . "$from\n" |
444 | . "Content-Type: text/plain; charset=\"" . get_option('blog_charset') . "\"\n"; |
445 |
|
446 | if ( isset($reply_to) ) |
447 | $message_headers .= $reply_to . "\n"; |
448 |
|
449 | $notify_message = apply_filters('comment_notification_text', $notify_message, $comment_id); |
450 | $subject = apply_filters('comment_notification_subject', $subject, $comment_id); |
451 | $message_headers = apply_filters('comment_notification_headers', $message_headers, $comment_id); |
452 |
|
453 | @wp_mail($user->user_email, $subject, $notify_message, $message_headers); |
454 | |
455 | return true; |
456 | } |
457 | endif; |
458 |
|
459 | /* wp_notify_moderator |