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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 |
|---|---|
| 1523 | * |
| 1524 | * Returning false disables the welcome email. |
| 1525 | * |
| 1526 | * @since MU |
| 1527 | * |
| 1528 | * @param int $user_id User ID. |
| 1529 | * @param string $password User password. |
| 1530 | * @param array $meta Signup meta data. |
| 1531 | */ |
| 1532 | if ( ! apply_filters( 'wpmu_welcome_user_notification', $user_id, $password, $meta ) ) |
| 1533 | return false; |
| 1534 | |
| 1535 | $welcome_email = get_site_option( 'welcome_user_email' ); |
| 1536 | |
| 1537 | $user = get_userdata( $user_id ); |
| 1538 | |
| 1539 | /** |
| 1540 | * Filter the content of the welcome email after user activation. |
| 1541 | * |