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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 |
|---|---|
| 1460 | * |
| 1461 | * @since MU |
| 1462 | * |
| 1463 | * @param int|bool $blog_id Blog ID. |
| 1464 | * @param int $user_id User ID. |
| 1465 | * @param string $password User password. |
| 1466 | * @param string $title Site title. |
| 1467 | * @param array $meta Signup meta data. |
| 1468 | */ |
| 1469 | if ( ! apply_filters( 'wpmu_welcome_notification', $blog_id, $user_id, $password, $title, $meta ) ) |
| 1470 | return false; |
| 1471 | |
| 1472 | $user = get_userdata( $user_id ); |
| 1473 | |
| 1474 | $switched_locale = switch_to_locale( get_user_locale( $user ) ); |
| 1475 | |
| 1476 | $welcome_email = get_site_option( 'welcome_email' ); |
| 1477 | if ( $welcome_email == false ) { |
| 1478 | /* translators: Do not translate USERNAME, SITE_NAME, BLOG_URL, PASSWORD: those are placeholders. */ |