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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 |
|---|---|
| 884 | * Filters the list of sites a user belongs to. |
| 885 | * |
| 886 | * @since MU (3.0.0) |
| 887 | * |
| 888 | * @param object[] $sites An array of site objects belonging to the user. |
| 889 | * @param int $user_id User ID. |
| 890 | * @param bool $all Whether the returned sites array should contain all sites, including |
| 891 | * those marked 'deleted', 'archived', or 'spam'. Default false. |
| 892 | */ |
| 893 | return apply_filters( 'get_blogs_of_user', $sites, $user_id, $all ); |
| 894 | } |
| 895 | |
| 896 | /** |
| 897 | * Find out whether a user is a member of a given blog. |
| 898 | * |
| 899 | * @since MU (3.0.0) |
| 900 | * |
| 901 | * @global wpdb $wpdb WordPress database abstraction object. |
| 902 | * |