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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 |
|---|---|
| 1596 | * |
| 1597 | * @since MU (3.0.0) |
| 1598 | * |
| 1599 | * @param int|false $blog_id Site ID, or false to prevent the email from sending. |
| 1600 | * @param int $user_id User ID of the site administrator. |
| 1601 | * @param string $password User password, or "N/A" if the user account is not new. |
| 1602 | * @param string $title Site title. |
| 1603 | * @param array $meta Signup meta data. By default, contains the requested privacy setting and lang_id. |
| 1604 | */ |
| 1605 | if ( ! apply_filters( 'wpmu_welcome_notification', $blog_id, $user_id, $password, $title, $meta ) ) { |
| 1606 | return false; |
| 1607 | } |
| 1608 | |
| 1609 | $user = get_userdata( $user_id ); |
| 1610 | |
| 1611 | $switched_locale = switch_to_locale( get_user_locale( $user ) ); |
| 1612 | |
| 1613 | $welcome_email = get_site_option( 'welcome_email' ); |
| 1614 | if ( false == $welcome_email ) { |