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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 |
|---|---|
| 2010 | $result = add_user_to_blog( $blog_id, $details[ 'user_id' ], $details[ 'role' ] ); |
| 2011 | /** |
| 2012 | * Fires immediately after an existing user is added to a site. |
| 2013 | * |
| 2014 | * @since MU |
| 2015 | * |
| 2016 | * @param int $user_id User ID. |
| 2017 | * @param mixed $result True on success or a WP_Error object if the user doesn't exist. |
| 2018 | */ |
| 2019 | do_action( 'added_existing_user', $details['user_id'], $result ); |
| 2020 | return $result; |
| 2021 | } |
| 2022 | } |
| 2023 | |
| 2024 | /** |
| 2025 | * Add a newly created user to the appropriate blog |
| 2026 | * |
| 2027 | * To add a user in general, use add_user_to_blog(). This function |
| 2028 | * is specifically hooked into the wpmu_activate_user action. |