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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 |
|---|---|
| 1390 | ); |
| 1391 | /** |
| 1392 | * Filters the message body of the new site activation email sent |
| 1393 | * to the network administrator. |
| 1394 | * |
| 1395 | * @since MU (3.0.0) |
| 1396 | * |
| 1397 | * @param string $msg Email body. |
| 1398 | */ |
| 1399 | $msg = apply_filters( 'newblog_notify_siteadmin', $msg ); |
| 1400 | |
| 1401 | wp_mail( $email, sprintf( __( 'New Site Registration: %s' ), $siteurl ), $msg ); |
| 1402 | return true; |
| 1403 | } |
| 1404 | |
| 1405 | /** |
| 1406 | * Notifies the network admin that a new user has been activated. |
| 1407 | * |
| 1408 | * Filter {@see 'newuser_notify_siteadmin'} to change the content of |