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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 |
|---|---|
| 1537 | * |
| 1538 | * @since MU (3.0.0) |
| 1539 | * |
| 1540 | * @param int|bool $blog_id Blog ID. |
| 1541 | * @param int $user_id User ID. |
| 1542 | * @param string $password User password. |
| 1543 | * @param string $title Site title. |
| 1544 | * @param array $meta Signup meta data. By default, contains the requested privacy setting and lang_id. |
| 1545 | */ |
| 1546 | if ( ! apply_filters( 'wpmu_welcome_notification', $blog_id, $user_id, $password, $title, $meta ) ) |
| 1547 | return false; |
| 1548 | |
| 1549 | $user = get_userdata( $user_id ); |
| 1550 | |
| 1551 | $switched_locale = switch_to_locale( get_user_locale( $user ) ); |
| 1552 | |
| 1553 | $welcome_email = get_site_option( 'welcome_email' ); |
| 1554 | if ( $welcome_email == false ) { |
| 1555 | /* translators: Do not translate USERNAME, SITE_NAME, BLOG_URL, PASSWORD: those are placeholders. */ |