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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 |
|---|---|
| 1139 | * Filters the list of sites a user belongs to. |
| 1140 | * |
| 1141 | * @since MU (3.0.0) |
| 1142 | * |
| 1143 | * @param object[] $sites An array of site objects belonging to the user. |
| 1144 | * @param int $user_id User ID. |
| 1145 | * @param bool $all Whether the returned sites array should contain all sites, including |
| 1146 | * those flagged for deletion, archived, or marked as spam. |
| 1147 | */ |
| 1148 | return apply_filters( 'get_blogs_of_user', $sites, $user_id, $all ); |
| 1149 | } |
| 1150 | |
| 1151 | /** |
| 1152 | * Finds out whether a user is a member of a given blog. |
| 1153 | * |
| 1154 | * @since MU (3.0.0) |
| 1155 | * |
| 1156 | * @global wpdb $wpdb WordPress database abstraction object. |
| 1157 | * |