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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 |
|---|---|
| 293 | } |
| 294 | |
| 295 | $message_headers = "MIME-Version: 1.0\n" |
| 296 | . "$from\n" |
| 297 | . "Content-Type: text/plain; charset=\"" . get_settings('blog_charset') . "\"\n"; |
| 298 | |
| 299 | if ( isset($reply_to) ) |
| 300 | $message_headers .= $reply_to . "\n"; |
| 301 | |
| 302 | $notify_message = apply_filters('comment_notification_text', $notify_message); |
| 303 | $subject = apply_filters('comment_notification_subject', $subject); |
| 304 | $message_headers = apply_filters('comment_notification_headers', $message_headers); |
| 305 | |
| 306 | @wp_mail($user->user_email, $subject, $notify_message, $message_headers); |
| 307 | |
| 308 | return true; |
| 309 | } |
| 310 | endif; |
| 311 | |