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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 |
|---|---|
| 170 | /** |
| 171 | * Fires immediately after a user is added to a site. |
| 172 | * |
| 173 | * @since MU |
| 174 | * |
| 175 | * @param int $user_id User ID. |
| 176 | * @param string $role User role. |
| 177 | * @param int $blog_id Blog ID. |
| 178 | */ |
| 179 | do_action( 'add_user_to_blog', $user_id, $role, $blog_id ); |
| 180 | wp_cache_delete( $user_id, 'users' ); |
| 181 | wp_cache_delete( $blog_id . '_user_count', 'blog-details' ); |
| 182 | restore_current_blog(); |
| 183 | return true; |
| 184 | } |
| 185 | |
| 186 | /** |
| 187 | * Remove a user from a blog. |
| 188 | * |