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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 |
|---|---|
| 1647 | * |
| 1648 | * Returning false disables the welcome email. |
| 1649 | * |
| 1650 | * @since MU (3.0.0) |
| 1651 | * |
| 1652 | * @param int $user_id User ID. |
| 1653 | * @param string $password User password. |
| 1654 | * @param array $meta Signup meta data. Default empty array. |
| 1655 | */ |
| 1656 | if ( ! apply_filters( 'wpmu_welcome_user_notification', $user_id, $password, $meta ) ) |
| 1657 | return false; |
| 1658 | |
| 1659 | $welcome_email = get_site_option( 'welcome_user_email' ); |
| 1660 | |
| 1661 | $user = get_userdata( $user_id ); |
| 1662 | |
| 1663 | $switched_locale = switch_to_locale( get_user_locale( $user ) ); |
| 1664 | |
| 1665 | /** |