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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 |
|---|---|
| 1459 | * Filters the message body of the new site activation email sent |
| 1460 | * to the network administrator. |
| 1461 | * |
| 1462 | * @since MU (3.0.0) |
| 1463 | * @since 5.4.0 The `$blog_id` parameter was added. |
| 1464 | * |
| 1465 | * @param string $msg Email body. |
| 1466 | * @param int $blog_id The new site's ID. |
| 1467 | */ |
| 1468 | $msg = apply_filters( 'newblog_notify_siteadmin', $msg, $blog_id ); |
| 1469 | |
| 1470 | /* translators: New site notification email subject. %s: New site URL. */ |
| 1471 | wp_mail( $email, sprintf( __( 'New Site Registration: %s' ), $siteurl ), $msg ); |
| 1472 | |
| 1473 | return true; |
| 1474 | } |
| 1475 | |
| 1476 | /** |
| 1477 | * Notifies the network admin that a new user has been activated. |